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Finding the Fourth Proportional to 158,612.79, 218,865.45 and 90,634.14

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Solution

The fourth proportional to 158,612.79, 218,865.45 and 90,634.14 is: 125,063.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,612.79 : 218,865.45 = 90,634.14 : x
  2. Step 2: Convert to fraction form
    158,612.79/218,865.45 = 90,634.14/x
  3. Step 3: Cross multiply
    158,612.79x = 218,865.45 × 90,634.14
  4. Step 4: Simplify right side
    158,612.79x = 19,836,681,836.46
  5. Step 5: Solve for x
    x = 19,836,681,836.46/158,612.79
  6. Step 6: Final answer
    x = 125,063.57

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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.