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Finding the Fourth Proportional to 115,937.70, 173,906.55 and 71,420.10

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Solution

The fourth proportional to 115,937.70, 173,906.55 and 71,420.10 is: 107,130.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,937.70 : 173,906.55 = 71,420.10 : x
  2. Step 2: Convert to fraction form
    115,937.70/173,906.55 = 71,420.10/x
  3. Step 3: Cross multiply
    115,937.70x = 173,906.55 × 71,420.10
  4. Step 4: Simplify right side
    115,937.70x = 12,420,423,191.66
  5. Step 5: Solve for x
    x = 12,420,423,191.66/115,937.70
  6. Step 6: Final answer
    x = 107,130.15

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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.