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Finding the Fourth Proportional to 86,540.80, 129,847.65 and 47,126.20

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Solution

The fourth proportional to 86,540.80, 129,847.65 and 47,126.20 is: 70,709.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,540.80 : 129,847.65 = 47,126.20 : x
  2. Step 2: Convert to fraction form
    86,540.80/129,847.65 = 47,126.20/x
  3. Step 3: Cross multiply
    86,540.80x = 129,847.65 × 47,126.20
  4. Step 4: Simplify right side
    86,540.80x = 6,119,226,323.43
  5. Step 5: Solve for x
    x = 6,119,226,323.43/86,540.80
  6. Step 6: Final answer
    x = 70,709.15

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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.