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Finding the Fourth Proportional to 100,432.28, 150,672.78 and 30,307.40

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Solution

The fourth proportional to 100,432.28, 150,672.78 and 30,307.40 is: 45,468.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,432.28 : 150,672.78 = 30,307.40 : x
  2. Step 2: Convert to fraction form
    100,432.28/150,672.78 = 30,307.40/x
  3. Step 3: Cross multiply
    100,432.28x = 150,672.78 × 30,307.40
  4. Step 4: Simplify right side
    100,432.28x = 4,566,500,212.57
  5. Step 5: Solve for x
    x = 4,566,500,212.57/100,432.28
  6. Step 6: Final answer
    x = 45,468.45

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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.