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Finding the Fourth Proportional to 115,909.80, 173,979.90 and 56,812.20

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Solution

The fourth proportional to 115,909.80, 173,979.90 and 56,812.20 is: 85,274.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,909.80 : 173,979.90 = 56,812.20 : x
  2. Step 2: Convert to fraction form
    115,909.80/173,979.90 = 56,812.20/x
  3. Step 3: Cross multiply
    115,909.80x = 173,979.90 × 56,812.20
  4. Step 4: Simplify right side
    115,909.80x = 9,884,180,874.78
  5. Step 5: Solve for x
    x = 9,884,180,874.78/115,909.80
  6. Step 6: Final answer
    x = 85,274.76

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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.