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Finding the Fourth Proportional to 66,701.68, 100,045.12 and 16,781.78

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Solution

The fourth proportional to 66,701.68, 100,045.12 and 16,781.78 is: 25,170.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,701.68 : 100,045.12 = 16,781.78 : x
  2. Step 2: Convert to fraction form
    66,701.68/100,045.12 = 16,781.78/x
  3. Step 3: Cross multiply
    66,701.68x = 100,045.12 × 16,781.78
  4. Step 4: Simplify right side
    66,701.68x = 1,678,935,402.07
  5. Step 5: Solve for x
    x = 1,678,935,402.07/66,701.68
  6. Step 6: Final answer
    x = 25,170.81

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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.