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Finding the Fourth Proportional to 101,715.30, 152,140.95 and 91,260.90

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Solution

The fourth proportional to 101,715.30, 152,140.95 and 91,260.90 is: 136,503.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,715.30 : 152,140.95 = 91,260.90 : x
  2. Step 2: Convert to fraction form
    101,715.30/152,140.95 = 91,260.90/x
  3. Step 3: Cross multiply
    101,715.30x = 152,140.95 × 91,260.90
  4. Step 4: Simplify right side
    101,715.30x = 13,884,520,023.86
  5. Step 5: Solve for x
    x = 13,884,520,023.86/101,715.30
  6. Step 6: Final answer
    x = 136,503.75

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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.