Home / 100,931.13-151,530.62-86,234.49

Finding the Fourth Proportional to 100,931.13, 151,530.62 and 86,234.49

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Solution

The fourth proportional to 100,931.13, 151,530.62 and 86,234.49 is: 129,466.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,931.13 : 151,530.62 = 86,234.49 : x
  2. Step 2: Convert to fraction form
    100,931.13/151,530.62 = 86,234.49/x
  3. Step 3: Cross multiply
    100,931.13x = 151,530.62 × 86,234.49
  4. Step 4: Simplify right side
    100,931.13x = 13,067,165,303.91
  5. Step 5: Solve for x
    x = 13,067,165,303.91/100,931.13
  6. Step 6: Final answer
    x = 129,466.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.