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Finding the Fourth Proportional to 157,079.25, 216,768.15 and 85,459.05

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Solution

The fourth proportional to 157,079.25, 216,768.15 and 85,459.05 is: 117,932.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,079.25 : 216,768.15 = 85,459.05 : x
  2. Step 2: Convert to fraction form
    157,079.25/216,768.15 = 85,459.05/x
  3. Step 3: Cross multiply
    157,079.25x = 216,768.15 × 85,459.05
  4. Step 4: Simplify right side
    157,079.25x = 18,524,800,169.26
  5. Step 5: Solve for x
    x = 18,524,800,169.26/157,079.25
  6. Step 6: Final answer
    x = 117,932.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.