Home / 158,345.10-218,508.18-86,711.30

Finding the Fourth Proportional to 158,345.10, 218,508.18 and 86,711.30

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Solution

The fourth proportional to 158,345.10, 218,508.18 and 86,711.30 is: 119,657.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,345.10 : 218,508.18 = 86,711.30 : x
  2. Step 2: Convert to fraction form
    158,345.10/218,508.18 = 86,711.30/x
  3. Step 3: Cross multiply
    158,345.10x = 218,508.18 × 86,711.30
  4. Step 4: Simplify right side
    158,345.10x = 18,947,128,348.43
  5. Step 5: Solve for x
    x = 18,947,128,348.43/158,345.10
  6. Step 6: Final answer
    x = 119,657.18

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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.