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Finding the Fourth Proportional to 115,492.11, 159,374.59 and 72,494.70

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Solution

The fourth proportional to 115,492.11, 159,374.59 and 72,494.70 is: 100,039.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,492.11 : 159,374.59 = 72,494.70 : x
  2. Step 2: Convert to fraction form
    115,492.11/159,374.59 = 72,494.70/x
  3. Step 3: Cross multiply
    115,492.11x = 159,374.59 × 72,494.70
  4. Step 4: Simplify right side
    115,492.11x = 11,553,813,089.67
  5. Step 5: Solve for x
    x = 11,553,813,089.67/115,492.11
  6. Step 6: Final answer
    x = 100,039.85

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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.