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Finding the Fourth Proportional to 238,236.65, 357,279.18 and 78,275.71

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Solution

The fourth proportional to 238,236.65, 357,279.18 and 78,275.71 is: 117,388.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    238,236.65 : 357,279.18 = 78,275.71 : x
  2. Step 2: Convert to fraction form
    238,236.65/357,279.18 = 78,275.71/x
  3. Step 3: Cross multiply
    238,236.65x = 357,279.18 × 78,275.71
  4. Step 4: Simplify right side
    238,236.65x = 27,966,281,635.78
  5. Step 5: Solve for x
    x = 27,966,281,635.78/238,236.65
  6. Step 6: Final answer
    x = 117,388.66

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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.