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Finding the Fourth Proportional to 66,145.47, 99,231.87 and 21,774.88

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Solution

The fourth proportional to 66,145.47, 99,231.87 and 21,774.88 is: 32,666.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,145.47 : 99,231.87 = 21,774.88 : x
  2. Step 2: Convert to fraction form
    66,145.47/99,231.87 = 21,774.88/x
  3. Step 3: Cross multiply
    66,145.47x = 99,231.87 × 21,774.88
  4. Step 4: Simplify right side
    66,145.47x = 2,160,762,061.43
  5. Step 5: Solve for x
    x = 2,160,762,061.43/66,145.47
  6. Step 6: Final answer
    x = 32,666.82

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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.