Home / 72,220,140.50-99,663,987.07-39,180,389.63

Finding the Fourth Proportional to 72,220,140.50, 99,663,987.07 and 39,180,389.63

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Solution

The fourth proportional to 72,220,140.50, 99,663,987.07 and 39,180,389.63 is: 54,069,042.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,220,140.50 : 99,663,987.07 = 39,180,389.63 : x
  2. Step 2: Convert to fraction form
    72,220,140.50/99,663,987.07 = 39,180,389.63/x
  3. Step 3: Cross multiply
    72,220,140.50x = 99,663,987.07 × 39,180,389.63
  4. Step 4: Simplify right side
    72,220,140.50x = 3,904,873,845,481,882
  5. Step 5: Solve for x
    x = 3,904,873,845,481,882/72,220,140.50
  6. Step 6: Final answer
    x = 54,069,042.49

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.