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Finding the Fourth Proportional to 243,017.64, 335,363.88 and 135,581.28

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Solution

The fourth proportional to 243,017.64, 335,363.88 and 135,581.28 is: 187,101.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,017.64 : 335,363.88 = 135,581.28 : x
  2. Step 2: Convert to fraction form
    243,017.64/335,363.88 = 135,581.28/x
  3. Step 3: Cross multiply
    243,017.64x = 335,363.88 × 135,581.28
  4. Step 4: Simplify right side
    243,017.64x = 45,469,064,116.17
  5. Step 5: Solve for x
    x = 45,469,064,116.17/243,017.64
  6. Step 6: Final answer
    x = 187,101.91

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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.