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Finding the Fourth Proportional to 85,328.70, 127,829.85 and 45,872.70

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Solution

The fourth proportional to 85,328.70, 127,829.85 and 45,872.70 is: 68,721.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,328.70 : 127,829.85 = 45,872.70 : x
  2. Step 2: Convert to fraction form
    85,328.70/127,829.85 = 45,872.70/x
  3. Step 3: Cross multiply
    85,328.70x = 127,829.85 × 45,872.70
  4. Step 4: Simplify right side
    85,328.70x = 5,863,900,360.10
  5. Step 5: Solve for x
    x = 5,863,900,360.10/85,328.70
  6. Step 6: Final answer
    x = 68,721.31

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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.