Home / 85,278.40-127,916.40-38,531.20

Finding the Fourth Proportional to 85,278.40, 127,916.40 and 38,531.20

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Solution

The fourth proportional to 85,278.40, 127,916.40 and 38,531.20 is: 57,796.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,278.40 : 127,916.40 = 38,531.20 : x
  2. Step 2: Convert to fraction form
    85,278.40/127,916.40 = 38,531.20/x
  3. Step 3: Cross multiply
    85,278.40x = 127,916.40 × 38,531.20
  4. Step 4: Simplify right side
    85,278.40x = 4,928,772,391.68
  5. Step 5: Solve for x
    x = 4,928,772,391.68/85,278.40
  6. Step 6: Final answer
    x = 57,796.26

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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.