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Finding the Fourth Proportional to 100,534.64, 151,508 and 90,551.88

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Solution

The fourth proportional to 100,534.64, 151,508 and 90,551.88 is: 136,463.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,534.64 : 151,508 = 90,551.88 : x
  2. Step 2: Convert to fraction form
    100,534.64/151,508 = 90,551.88/x
  3. Step 3: Cross multiply
    100,534.64x = 151,508 × 90,551.88
  4. Step 4: Simplify right side
    100,534.64x = 13,719,334,235.04
  5. Step 5: Solve for x
    x = 13,719,334,235.04/100,534.64
  6. Step 6: Final answer
    x = 136,463.75

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.