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Finding the Fourth Proportional to 66,778.59, 100,167.89 and 20,031.47

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Solution

The fourth proportional to 66,778.59, 100,167.89 and 20,031.47 is: 30,047.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,778.59 : 100,167.89 = 20,031.47 : x
  2. Step 2: Convert to fraction form
    66,778.59/100,167.89 = 20,031.47/x
  3. Step 3: Cross multiply
    66,778.59x = 100,167.89 × 20,031.47
  4. Step 4: Simplify right side
    66,778.59x = 2,006,509,970.81
  5. Step 5: Solve for x
    x = 2,006,509,970.81/66,778.59
  6. Step 6: Final answer
    x = 30,047.20

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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.