Home / 100,115.24-138,157.16-54,792.30

Finding the Fourth Proportional to 100,115.24, 138,157.16 and 54,792.30

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Solution

The fourth proportional to 100,115.24, 138,157.16 and 54,792.30 is: 75,612.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,115.24 : 138,157.16 = 54,792.30 : x
  2. Step 2: Convert to fraction form
    100,115.24/138,157.16 = 54,792.30/x
  3. Step 3: Cross multiply
    100,115.24x = 138,157.16 × 54,792.30
  4. Step 4: Simplify right side
    100,115.24x = 7,569,948,557.87
  5. Step 5: Solve for x
    x = 7,569,948,557.87/100,115.24
  6. Step 6: Final answer
    x = 75,612.35

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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.