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Finding the Fourth Proportional to 87,488.90, 120,734.65 and 47,744.90

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Solution

The fourth proportional to 87,488.90, 120,734.65 and 47,744.90 is: 65,887.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,488.90 : 120,734.65 = 47,744.90 : x
  2. Step 2: Convert to fraction form
    87,488.90/120,734.65 = 47,744.90/x
  3. Step 3: Cross multiply
    87,488.90x = 120,734.65 × 47,744.90
  4. Step 4: Simplify right side
    87,488.90x = 5,764,463,790.79
  5. Step 5: Solve for x
    x = 5,764,463,790.79/87,488.90
  6. Step 6: Final answer
    x = 65,887.94

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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.