Home / 100,645.18-138,897.60-60,358.20

Finding the Fourth Proportional to 100,645.18, 138,897.60 and 60,358.20

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Solution

The fourth proportional to 100,645.18, 138,897.60 and 60,358.20 is: 83,298.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,645.18 : 138,897.60 = 60,358.20 : x
  2. Step 2: Convert to fraction form
    100,645.18/138,897.60 = 60,358.20/x
  3. Step 3: Cross multiply
    100,645.18x = 138,897.60 × 60,358.20
  4. Step 4: Simplify right side
    100,645.18x = 8,383,609,120.32
  5. Step 5: Solve for x
    x = 8,383,609,120.32/100,645.18
  6. Step 6: Final answer
    x = 83,298.66

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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.