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Finding the Fourth Proportional to 243,139.88, 335,549.94 and 135,730.88

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Solution

The fourth proportional to 243,139.88, 335,549.94 and 135,730.88 is: 187,318.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,139.88 : 335,549.94 = 135,730.88 : x
  2. Step 2: Convert to fraction form
    243,139.88/335,549.94 = 135,730.88/x
  3. Step 3: Cross multiply
    243,139.88x = 335,549.94 × 135,730.88
  4. Step 4: Simplify right side
    243,139.88x = 45,544,488,640.15
  5. Step 5: Solve for x
    x = 45,544,488,640.15/243,139.88
  6. Step 6: Final answer
    x = 187,318.05

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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.