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Finding the Fourth Proportional to 64,702.86, 89,272.01 and 38,854.74

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Solution

The fourth proportional to 64,702.86, 89,272.01 and 38,854.74 is: 53,608.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,702.86 : 89,272.01 = 38,854.74 : x
  2. Step 2: Convert to fraction form
    64,702.86/89,272.01 = 38,854.74/x
  3. Step 3: Cross multiply
    64,702.86x = 89,272.01 × 38,854.74
  4. Step 4: Simplify right side
    64,702.86x = 3,468,640,543.55
  5. Step 5: Solve for x
    x = 3,468,640,543.55/64,702.86
  6. Step 6: Final answer
    x = 53,608.77

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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.