Home / 72,220.35-99,663.75-40,389.38

Finding the Fourth Proportional to 72,220.35, 99,663.75 and 40,389.38

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Solution

The fourth proportional to 72,220.35, 99,663.75 and 40,389.38 is: 55,737.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,220.35 : 99,663.75 = 40,389.38 : x
  2. Step 2: Convert to fraction form
    72,220.35/99,663.75 = 40,389.38/x
  3. Step 3: Cross multiply
    72,220.35x = 99,663.75 × 40,389.38
  4. Step 4: Simplify right side
    72,220.35x = 4,025,357,070.98
  5. Step 5: Solve for x
    x = 4,025,357,070.98/72,220.35
  6. Step 6: Final answer
    x = 55,737.16

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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.