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Finding the Fourth Proportional to 72,925.78, 100,637.58 and 39,391.78

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Solution

The fourth proportional to 72,925.78, 100,637.58 and 39,391.78 is: 54,360.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,925.78 : 100,637.58 = 39,391.78 : x
  2. Step 2: Convert to fraction form
    72,925.78/100,637.58 = 39,391.78/x
  3. Step 3: Cross multiply
    72,925.78x = 100,637.58 × 39,391.78
  4. Step 4: Simplify right side
    72,925.78x = 3,964,293,411.09
  5. Step 5: Solve for x
    x = 3,964,293,411.09/72,925.78
  6. Step 6: Final answer
    x = 54,360.66

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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.