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Finding the Fourth Proportional to 115,902.70, 173,854.05 and 74,430.70

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Solution

The fourth proportional to 115,902.70, 173,854.05 and 74,430.70 is: 111,646.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,902.70 : 173,854.05 = 74,430.70 : x
  2. Step 2: Convert to fraction form
    115,902.70/173,854.05 = 74,430.70/x
  3. Step 3: Cross multiply
    115,902.70x = 173,854.05 × 74,430.70
  4. Step 4: Simplify right side
    115,902.70x = 12,940,078,639.34
  5. Step 5: Solve for x
    x = 12,940,078,639.34/115,902.70
  6. Step 6: Final answer
    x = 111,646.05

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1.5x scale

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.