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Finding the Fourth Proportional to 85,223.95, 127,824.09 and 45,225.43

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Solution

The fourth proportional to 85,223.95, 127,824.09 and 45,225.43 is: 67,831.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,223.95 : 127,824.09 = 45,225.43 : x
  2. Step 2: Convert to fraction form
    85,223.95/127,824.09 = 45,225.43/x
  3. Step 3: Cross multiply
    85,223.95x = 127,824.09 × 45,225.43
  4. Step 4: Simplify right side
    85,223.95x = 5,780,899,434.61
  5. Step 5: Solve for x
    x = 5,780,899,434.61/85,223.95
  6. Step 6: Final answer
    x = 67,831.86

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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.