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Finding the Fourth Proportional to 86,575.68, 129,870.96 and 30,410.91

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Solution

The fourth proportional to 86,575.68, 129,870.96 and 30,410.91 is: 45,618.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,575.68 : 129,870.96 = 30,410.91 : x
  2. Step 2: Convert to fraction form
    86,575.68/129,870.96 = 30,410.91/x
  3. Step 3: Cross multiply
    86,575.68x = 129,870.96 × 30,410.91
  4. Step 4: Simplify right side
    86,575.68x = 3,949,494,076.17
  5. Step 5: Solve for x
    x = 3,949,494,076.17/86,575.68
  6. Step 6: Final answer
    x = 45,618.98

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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.