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Finding the Fourth Proportional to 140,928, 211,392 and 42,432

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Solution

The fourth proportional to 140,928, 211,392 and 42,432 is: 63,648

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,928 : 211,392 = 42,432 : x
  2. Step 2: Convert to fraction form
    140,928/211,392 = 42,432/x
  3. Step 3: Cross multiply
    140,928x = 211,392 × 42,432
  4. Step 4: Simplify right side
    140,928x = 8,969,785,344
  5. Step 5: Solve for x
    x = 8,969,785,344/140,928
  6. Step 6: Final answer
    x = 63,648

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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.