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Finding the Fourth Proportional to 72,564.60, 108,702.90 and 63,905.40

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Solution

The fourth proportional to 72,564.60, 108,702.90 and 63,905.40 is: 95,731.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,564.60 : 108,702.90 = 63,905.40 : x
  2. Step 2: Convert to fraction form
    72,564.60/108,702.90 = 63,905.40/x
  3. Step 3: Cross multiply
    72,564.60x = 108,702.90 × 63,905.40
  4. Step 4: Simplify right side
    72,564.60x = 6,946,702,305.66
  5. Step 5: Solve for x
    x = 6,946,702,305.66/72,564.60
  6. Step 6: Final answer
    x = 95,731.28

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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.