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Finding the Fourth Proportional to 158,698.23, 218,989.60 and 90,701.70

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Solution

The fourth proportional to 158,698.23, 218,989.60 and 90,701.70 is: 125,160.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,698.23 : 218,989.60 = 90,701.70 : x
  2. Step 2: Convert to fraction form
    158,698.23/218,989.60 = 90,701.70/x
  3. Step 3: Cross multiply
    158,698.23x = 218,989.60 × 90,701.70
  4. Step 4: Simplify right side
    158,698.23x = 19,862,729,002.32
  5. Step 5: Solve for x
    x = 19,862,729,002.32/158,698.23
  6. Step 6: Final answer
    x = 125,160.37

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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.