Home / 100,432.12-138,779.72-73,160.76

Finding the Fourth Proportional to 100,432.12, 138,779.72 and 73,160.76

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Solution

The fourth proportional to 100,432.12, 138,779.72 and 73,160.76 is: 101,095.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,432.12 : 138,779.72 = 73,160.76 : x
  2. Step 2: Convert to fraction form
    100,432.12/138,779.72 = 73,160.76/x
  3. Step 3: Cross multiply
    100,432.12x = 138,779.72 × 73,160.76
  4. Step 4: Simplify right side
    100,432.12x = 10,153,229,787.79
  5. Step 5: Solve for x
    x = 10,153,229,787.79/100,432.12
  6. Step 6: Final answer
    x = 101,095.44

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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.