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Finding the Fourth Proportional to 72,909.30, 109,363.95 and 62,411.70

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Solution

The fourth proportional to 72,909.30, 109,363.95 and 62,411.70 is: 93,617.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,909.30 : 109,363.95 = 62,411.70 : x
  2. Step 2: Convert to fraction form
    72,909.30/109,363.95 = 62,411.70/x
  3. Step 3: Cross multiply
    72,909.30x = 109,363.95 × 62,411.70
  4. Step 4: Simplify right side
    72,909.30x = 6,825,590,038.22
  5. Step 5: Solve for x
    x = 6,825,590,038.22/72,909.30
  6. Step 6: Final answer
    x = 93,617.55

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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.