Home / 85,831.90-128,747.85-82,332.70

Finding the Fourth Proportional to 85,831.90, 128,747.85 and 82,332.70

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Solution

The fourth proportional to 85,831.90, 128,747.85 and 82,332.70 is: 123,499.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,831.90 : 128,747.85 = 82,332.70 : x
  2. Step 2: Convert to fraction form
    85,831.90/128,747.85 = 82,332.70/x
  3. Step 3: Cross multiply
    85,831.90x = 128,747.85 × 82,332.70
  4. Step 4: Simplify right side
    85,831.90x = 10,600,158,109.70
  5. Step 5: Solve for x
    x = 10,600,158,109.70/85,831.90
  6. Step 6: Final answer
    x = 123,499.05

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Similar ratio
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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.