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Finding the Fourth Proportional to 66,462.42, 99,710.02 and 19,715.28

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Solution

The fourth proportional to 66,462.42, 99,710.02 and 19,715.28 is: 29,577.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,462.42 : 99,710.02 = 19,715.28 : x
  2. Step 2: Convert to fraction form
    66,462.42/99,710.02 = 19,715.28/x
  3. Step 3: Cross multiply
    66,462.42x = 99,710.02 × 19,715.28
  4. Step 4: Simplify right side
    66,462.42x = 1,965,810,963.11
  5. Step 5: Solve for x
    x = 1,965,810,963.11/66,462.42
  6. Step 6: Final answer
    x = 29,577.78

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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.