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Finding the Fourth Proportional to 158,355.36, 218,403 and 122,641.92

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Solution

The fourth proportional to 158,355.36, 218,403 and 122,641.92 is: 169,147.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,355.36 : 218,403 = 122,641.92 : x
  2. Step 2: Convert to fraction form
    158,355.36/218,403 = 122,641.92/x
  3. Step 3: Cross multiply
    158,355.36x = 218,403 × 122,641.92
  4. Step 4: Simplify right side
    158,355.36x = 26,785,363,253.76
  5. Step 5: Solve for x
    x = 26,785,363,253.76/158,355.36
  6. Step 6: Final answer
    x = 169,147.18

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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.