Home / 85,173.18-127,759.77-38,439.42

Finding the Fourth Proportional to 85,173.18, 127,759.77 and 38,439.42

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Solution

The fourth proportional to 85,173.18, 127,759.77 and 38,439.42 is: 57,659.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,173.18 : 127,759.77 = 38,439.42 : x
  2. Step 2: Convert to fraction form
    85,173.18/127,759.77 = 38,439.42/x
  3. Step 3: Cross multiply
    85,173.18x = 127,759.77 × 38,439.42
  4. Step 4: Simplify right side
    85,173.18x = 4,911,011,458.13
  5. Step 5: Solve for x
    x = 4,911,011,458.13/85,173.18
  6. Step 6: Final answer
    x = 57,659.13

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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.