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Finding the Fourth Proportional to 243,159.36, 335,559 and 135,728.45

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Solution

The fourth proportional to 243,159.36, 335,559 and 135,728.45 is: 187,304.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,159.36 : 335,559 = 135,728.45 : x
  2. Step 2: Convert to fraction form
    243,159.36/335,559 = 135,728.45/x
  3. Step 3: Cross multiply
    243,159.36x = 335,559 × 135,728.45
  4. Step 4: Simplify right side
    243,159.36x = 45,544,902,953.55
  5. Step 5: Solve for x
    x = 45,544,902,953.55/243,159.36
  6. Step 6: Final answer
    x = 187,304.75

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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.