Home / 86,990.28-130,332-76,196.16

Finding the Fourth Proportional to 86,990.28, 130,332 and 76,196.16

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Solution

The fourth proportional to 86,990.28, 130,332 and 76,196.16 is: 114,159.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,990.28 : 130,332 = 76,196.16 : x
  2. Step 2: Convert to fraction form
    86,990.28/130,332 = 76,196.16/x
  3. Step 3: Cross multiply
    86,990.28x = 130,332 × 76,196.16
  4. Step 4: Simplify right side
    86,990.28x = 9,930,797,925.12
  5. Step 5: Solve for x
    x = 9,930,797,925.12/86,990.28
  6. Step 6: Final answer
    x = 114,159.86

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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.