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Finding the Fourth Proportional to 72,117.92, 99,522.48 and 39,851.64

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Solution

The fourth proportional to 72,117.92, 99,522.48 and 39,851.64 is: 54,995.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,117.92 : 99,522.48 = 39,851.64 : x
  2. Step 2: Convert to fraction form
    72,117.92/99,522.48 = 39,851.64/x
  3. Step 3: Cross multiply
    72,117.92x = 99,522.48 × 39,851.64
  4. Step 4: Simplify right side
    72,117.92x = 3,966,134,044.87
  5. Step 5: Solve for x
    x = 3,966,134,044.87/72,117.92
  6. Step 6: Final answer
    x = 54,995.13

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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.