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Finding the Fourth Proportional to 158,107.95, 218,187.19 and 86,487.12

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Solution

The fourth proportional to 158,107.95, 218,187.19 and 86,487.12 is: 119,351.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,107.95 : 218,187.19 = 86,487.12 : x
  2. Step 2: Convert to fraction form
    158,107.95/218,187.19 = 86,487.12/x
  3. Step 3: Cross multiply
    158,107.95x = 218,187.19 × 86,487.12
  4. Step 4: Simplify right side
    158,107.95x = 18,870,381,421.70
  5. Step 5: Solve for x
    x = 18,870,381,421.70/158,107.95
  6. Step 6: Final answer
    x = 119,351.25

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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.