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Finding the Fourth Proportional to 158,312.25, 218,473.29 and 86,698.92

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Solution

The fourth proportional to 158,312.25, 218,473.29 and 86,698.92 is: 119,645.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,312.25 : 218,473.29 = 86,698.92 : x
  2. Step 2: Convert to fraction form
    158,312.25/218,473.29 = 86,698.92/x
  3. Step 3: Cross multiply
    158,312.25x = 218,473.29 × 86,698.92
  4. Step 4: Simplify right side
    158,312.25x = 18,941,398,291.85
  5. Step 5: Solve for x
    x = 18,941,398,291.85/158,312.25
  6. Step 6: Final answer
    x = 119,645.82

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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.