Home / 154,113.60-212,642.72-100,393.28

Finding the Fourth Proportional to 154,113.60, 212,642.72 and 100,393.28

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Solution

The fourth proportional to 154,113.60, 212,642.72 and 100,393.28 is: 138,520.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,113.60 : 212,642.72 = 100,393.28 : x
  2. Step 2: Convert to fraction form
    154,113.60/212,642.72 = 100,393.28/x
  3. Step 3: Cross multiply
    154,113.60x = 212,642.72 × 100,393.28
  4. Step 4: Simplify right side
    154,113.60x = 21,347,900,128.92
  5. Step 5: Solve for x
    x = 21,347,900,128.92/154,113.60
  6. Step 6: Final answer
    x = 138,520.55

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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.