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Finding the Fourth Proportional to 243,687.40, 336,319.86 and 136,264.12

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Solution

The fourth proportional to 243,687.40, 336,319.86 and 136,264.12 is: 188,061.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,687.40 : 336,319.86 = 136,264.12 : x
  2. Step 2: Convert to fraction form
    243,687.40/336,319.86 = 136,264.12/x
  3. Step 3: Cross multiply
    243,687.40x = 336,319.86 × 136,264.12
  4. Step 4: Simplify right side
    243,687.40x = 45,828,329,761.42
  5. Step 5: Solve for x
    x = 45,828,329,761.42/243,687.40
  6. Step 6: Final answer
    x = 188,061.96

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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.