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Finding the Fourth Proportional to 243,108.91, 335,507.13 and 135,699.85

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Solution

The fourth proportional to 243,108.91, 335,507.13 and 135,699.85 is: 187,275.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,108.91 : 335,507.13 = 135,699.85 : x
  2. Step 2: Convert to fraction form
    243,108.91/335,507.13 = 135,699.85/x
  3. Step 3: Cross multiply
    243,108.91x = 335,507.13 × 135,699.85
  4. Step 4: Simplify right side
    243,108.91x = 45,528,267,214.93
  5. Step 5: Solve for x
    x = 45,528,267,214.93/243,108.91
  6. Step 6: Final answer
    x = 187,275.19

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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.