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Finding the Fourth Proportional to 66,931.40, 100,406.50 and 19,549.97

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Solution

The fourth proportional to 66,931.40, 100,406.50 and 19,549.97 is: 29,327.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,931.40 : 100,406.50 = 19,549.97 : x
  2. Step 2: Convert to fraction form
    66,931.40/100,406.50 = 19,549.97/x
  3. Step 3: Cross multiply
    66,931.40x = 100,406.50 × 19,549.97
  4. Step 4: Simplify right side
    66,931.40x = 1,962,944,057.11
  5. Step 5: Solve for x
    x = 1,962,944,057.11/66,931.40
  6. Step 6: Final answer
    x = 29,327.70

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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.