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Finding the Fourth Proportional to 158,689.60, 218,991.62 and 90,708.02

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Solution

The fourth proportional to 158,689.60, 218,991.62 and 90,708.02 is: 125,177.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,689.60 : 218,991.62 = 90,708.02 : x
  2. Step 2: Convert to fraction form
    158,689.60/218,991.62 = 90,708.02/x
  3. Step 3: Cross multiply
    158,689.60x = 218,991.62 × 90,708.02
  4. Step 4: Simplify right side
    158,689.60x = 19,864,296,246.79
  5. Step 5: Solve for x
    x = 19,864,296,246.79/158,689.60
  6. Step 6: Final answer
    x = 125,177.05

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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.