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Finding the Fourth Proportional to 104,491.90, 156,737.85 and 72,999.10

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Solution

The fourth proportional to 104,491.90, 156,737.85 and 72,999.10 is: 109,498.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,491.90 : 156,737.85 = 72,999.10 : x
  2. Step 2: Convert to fraction form
    104,491.90/156,737.85 = 72,999.10/x
  3. Step 3: Cross multiply
    104,491.90x = 156,737.85 × 72,999.10
  4. Step 4: Simplify right side
    104,491.90x = 11,441,721,985.94
  5. Step 5: Solve for x
    x = 11,441,721,985.94/104,491.90
  6. Step 6: Final answer
    x = 109,498.65

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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.