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Finding the Fourth Proportional to 158,387.66, 218,569.27 and 90,408.14

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Solution

The fourth proportional to 158,387.66, 218,569.27 and 90,408.14 is: 124,759.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,387.66 : 218,569.27 = 90,408.14 : x
  2. Step 2: Convert to fraction form
    158,387.66/218,569.27 = 90,408.14/x
  3. Step 3: Cross multiply
    158,387.66x = 218,569.27 × 90,408.14
  4. Step 4: Simplify right side
    158,387.66x = 19,760,441,161.86
  5. Step 5: Solve for x
    x = 19,760,441,161.86/158,387.66
  6. Step 6: Final answer
    x = 124,759.98

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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.