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Finding the Fourth Proportional to 115,691.59, 159,607.29 and 75,390.67

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Solution

The fourth proportional to 115,691.59, 159,607.29 and 75,390.67 is: 104,008.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,691.59 : 159,607.29 = 75,390.67 : x
  2. Step 2: Convert to fraction form
    115,691.59/159,607.29 = 75,390.67/x
  3. Step 3: Cross multiply
    115,691.59x = 159,607.29 × 75,390.67
  4. Step 4: Simplify right side
    115,691.59x = 12,032,900,529.98
  5. Step 5: Solve for x
    x = 12,032,900,529.98/115,691.59
  6. Step 6: Final answer
    x = 104,008.43

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1.5x scale

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.