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Finding the Fourth Proportional to 158,368.71, 218,548.86 and 86,751.30

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Solution

The fourth proportional to 158,368.71, 218,548.86 and 86,751.30 is: 119,716.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,368.71 : 218,548.86 = 86,751.30 : x
  2. Step 2: Convert to fraction form
    158,368.71/218,548.86 = 86,751.30/x
  3. Step 3: Cross multiply
    158,368.71x = 218,548.86 × 86,751.30
  4. Step 4: Simplify right side
    158,368.71x = 18,959,397,718.52
  5. Step 5: Solve for x
    x = 18,959,397,718.52/158,368.71
  6. Step 6: Final answer
    x = 119,716.82

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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.