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Finding the Fourth Proportional to 243,438.30, 335,938.65 and 136,009.13

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Solution

The fourth proportional to 243,438.30, 335,938.65 and 136,009.13 is: 187,689.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,438.30 : 335,938.65 = 136,009.13 : x
  2. Step 2: Convert to fraction form
    243,438.30/335,938.65 = 136,009.13/x
  3. Step 3: Cross multiply
    243,438.30x = 335,938.65 × 136,009.13
  4. Step 4: Simplify right side
    243,438.30x = 45,690,723,519.87
  5. Step 5: Solve for x
    x = 45,690,723,519.87/243,438.30
  6. Step 6: Final answer
    x = 187,689.13

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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.