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Finding the Fourth Proportional to 158,609.70, 218,880.36 and 90,647.46

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Solution

The fourth proportional to 158,609.70, 218,880.36 and 90,647.46 is: 125,092.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,609.70 : 218,880.36 = 90,647.46 : x
  2. Step 2: Convert to fraction form
    158,609.70/218,880.36 = 90,647.46/x
  3. Step 3: Cross multiply
    158,609.70x = 218,880.36 × 90,647.46
  4. Step 4: Simplify right side
    158,609.70x = 19,840,948,677.89
  5. Step 5: Solve for x
    x = 19,840,948,677.89/158,609.70
  6. Step 6: Final answer
    x = 125,092.91

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1.5x scale

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.