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Finding the Fourth Proportional to 71,833,420.80, 107,750,131.20 and 43,111,987.20

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Solution

The fourth proportional to 71,833,420.80, 107,750,131.20 and 43,111,987.20 is: 64,667,980.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,833,420.80 : 107,750,131.20 = 43,111,987.20 : x
  2. Step 2: Convert to fraction form
    71,833,420.80/107,750,131.20 = 43,111,987.20/x
  3. Step 3: Cross multiply
    71,833,420.80x = 107,750,131.20 × 43,111,987.20
  4. Step 4: Simplify right side
    71,833,420.80x = 4,645,322,277,092,721
  5. Step 5: Solve for x
    x = 4,645,322,277,092,721/71,833,420.80
  6. Step 6: Final answer
    x = 64,667,980.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.