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Finding the Fourth Proportional to 72,445.88, 108,678.96 and 68,461.88

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Solution

The fourth proportional to 72,445.88, 108,678.96 and 68,461.88 is: 102,702.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,445.88 : 108,678.96 = 68,461.88 : x
  2. Step 2: Convert to fraction form
    72,445.88/108,678.96 = 68,461.88/x
  3. Step 3: Cross multiply
    72,445.88x = 108,678.96 × 68,461.88
  4. Step 4: Simplify right side
    72,445.88x = 7,440,365,032.34
  5. Step 5: Solve for x
    x = 7,440,365,032.34/72,445.88
  6. Step 6: Final answer
    x = 102,702.40

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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.