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Finding the Fourth Proportional to 158,369.16, 218,552.96 and 90,384.78

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Solution

The fourth proportional to 158,369.16, 218,552.96 and 90,384.78 is: 124,733.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,369.16 : 218,552.96 = 90,384.78 : x
  2. Step 2: Convert to fraction form
    158,369.16/218,552.96 = 90,384.78/x
  3. Step 3: Cross multiply
    158,369.16x = 218,552.96 × 90,384.78
  4. Step 4: Simplify right side
    158,369.16x = 19,753,861,207.95
  5. Step 5: Solve for x
    x = 19,753,861,207.95/158,369.16
  6. Step 6: Final answer
    x = 124,733.00

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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.