Home / 85,128.12-127,711.68-25,964.88

Finding the Fourth Proportional to 85,128.12, 127,711.68 and 25,964.88

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Solution

The fourth proportional to 85,128.12, 127,711.68 and 25,964.88 is: 38,953.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,128.12 : 127,711.68 = 25,964.88 : x
  2. Step 2: Convert to fraction form
    85,128.12/127,711.68 = 25,964.88/x
  3. Step 3: Cross multiply
    85,128.12x = 127,711.68 × 25,964.88
  4. Step 4: Simplify right side
    85,128.12x = 3,316,018,445.80
  5. Step 5: Solve for x
    x = 3,316,018,445.80/85,128.12
  6. Step 6: Final answer
    x = 38,953.27

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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.