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Finding the Fourth Proportional to 238,178.76, 328,712.85 and 136,213.71

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Solution

The fourth proportional to 238,178.76, 328,712.85 and 136,213.71 is: 187,989.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    238,178.76 : 328,712.85 = 136,213.71 : x
  2. Step 2: Convert to fraction form
    238,178.76/328,712.85 = 136,213.71/x
  3. Step 3: Cross multiply
    238,178.76x = 328,712.85 × 136,213.71
  4. Step 4: Simplify right side
    238,178.76x = 44,775,196,823.17
  5. Step 5: Solve for x
    x = 44,775,196,823.17/238,178.76
  6. Step 6: Final answer
    x = 187,989.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.