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Finding the Fourth Proportional to 72,565.16, 108,878.72 and 39,246.21

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Solution

The fourth proportional to 72,565.16, 108,878.72 and 39,246.21 is: 58,886.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,565.16 : 108,878.72 = 39,246.21 : x
  2. Step 2: Convert to fraction form
    72,565.16/108,878.72 = 39,246.21/x
  3. Step 3: Cross multiply
    72,565.16x = 108,878.72 × 39,246.21
  4. Step 4: Simplify right side
    72,565.16x = 4,273,076,913.42
  5. Step 5: Solve for x
    x = 4,273,076,913.42/72,565.16
  6. Step 6: Final answer
    x = 58,886.07

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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.