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Finding the Fourth Proportional to 136,168.81, 187,781.02 and 90,848.64

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Solution

The fourth proportional to 136,168.81, 187,781.02 and 90,848.64 is: 125,283.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,168.81 : 187,781.02 = 90,848.64 : x
  2. Step 2: Convert to fraction form
    136,168.81/187,781.02 = 90,848.64/x
  3. Step 3: Cross multiply
    136,168.81x = 187,781.02 × 90,848.64
  4. Step 4: Simplify right side
    136,168.81x = 17,059,650,284.81
  5. Step 5: Solve for x
    x = 17,059,650,284.81/136,168.81
  6. Step 6: Final answer
    x = 125,283.10

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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.