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Finding the Fourth Proportional to 158,353.90, 218,531.93 and 90,369.52

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Solution

The fourth proportional to 158,353.90, 218,531.93 and 90,369.52 is: 124,711.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,353.90 : 218,531.93 = 90,369.52 : x
  2. Step 2: Convert to fraction form
    158,353.90/218,531.93 = 90,369.52/x
  3. Step 3: Cross multiply
    158,353.90x = 218,531.93 × 90,369.52
  4. Step 4: Simplify right side
    158,353.90x = 19,748,625,618.77
  5. Step 5: Solve for x
    x = 19,748,625,618.77/158,353.90
  6. Step 6: Final answer
    x = 124,711.96

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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.