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Finding the Fourth Proportional to 85,139.66, 127,709.14 and 25,975.14

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Solution

The fourth proportional to 85,139.66, 127,709.14 and 25,975.14 is: 38,962.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,139.66 : 127,709.14 = 25,975.14 : x
  2. Step 2: Convert to fraction form
    85,139.66/127,709.14 = 25,975.14/x
  3. Step 3: Cross multiply
    85,139.66x = 127,709.14 × 25,975.14
  4. Step 4: Simplify right side
    85,139.66x = 3,317,262,790.78
  5. Step 5: Solve for x
    x = 3,317,262,790.78/85,139.66
  6. Step 6: Final answer
    x = 38,962.60

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1.5x scale

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.