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Finding the Fourth Proportional to 158,475.15, 218,701.25 and 86,855.15

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Solution

The fourth proportional to 158,475.15, 218,701.25 and 86,855.15 is: 119,863.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,475.15 : 218,701.25 = 86,855.15 : x
  2. Step 2: Convert to fraction form
    158,475.15/218,701.25 = 86,855.15/x
  3. Step 3: Cross multiply
    158,475.15x = 218,701.25 × 86,855.15
  4. Step 4: Simplify right side
    158,475.15x = 18,995,330,312.12
  5. Step 5: Solve for x
    x = 18,995,330,312.12/158,475.15
  6. Step 6: Final answer
    x = 119,863.15

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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.