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Finding the Fourth Proportional to 115,931.70, 173,897.55 and 74,459.70

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Solution

The fourth proportional to 115,931.70, 173,897.55 and 74,459.70 is: 111,689.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,931.70 : 173,897.55 = 74,459.70 : x
  2. Step 2: Convert to fraction form
    115,931.70/173,897.55 = 74,459.70/x
  3. Step 3: Cross multiply
    115,931.70x = 173,897.55 × 74,459.70
  4. Step 4: Simplify right side
    115,931.70x = 12,948,359,403.74
  5. Step 5: Solve for x
    x = 12,948,359,403.74/115,931.70
  6. Step 6: Final answer
    x = 111,689.55

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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.