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Finding the Fourth Proportional to 86,560.61, 129,898.90 and 30,400.92

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Solution

The fourth proportional to 86,560.61, 129,898.90 and 30,400.92 is: 45,621.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,560.61 : 129,898.90 = 30,400.92 : x
  2. Step 2: Convert to fraction form
    86,560.61/129,898.90 = 30,400.92/x
  3. Step 3: Cross multiply
    86,560.61x = 129,898.90 × 30,400.92
  4. Step 4: Simplify right side
    86,560.61x = 3,949,045,914.98
  5. Step 5: Solve for x
    x = 3,949,045,914.98/86,560.61
  6. Step 6: Final answer
    x = 45,621.75

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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.