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Finding the Fourth Proportional to 158,385.16, 218,565.82 and 90,405.64

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Solution

The fourth proportional to 158,385.16, 218,565.82 and 90,405.64 is: 124,756.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,385.16 : 218,565.82 = 90,405.64 : x
  2. Step 2: Convert to fraction form
    158,385.16/218,565.82 = 90,405.64/x
  3. Step 3: Cross multiply
    158,385.16x = 218,565.82 × 90,405.64
  4. Step 4: Simplify right side
    158,385.16x = 19,759,582,839.22
  5. Step 5: Solve for x
    x = 19,759,582,839.22/158,385.16
  6. Step 6: Final answer
    x = 124,756.53

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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.