Home / 100,209.62-138,291.50-57,188.25

Finding the Fourth Proportional to 100,209.62, 138,291.50 and 57,188.25

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Solution

The fourth proportional to 100,209.62, 138,291.50 and 57,188.25 is: 78,921.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,209.62 : 138,291.50 = 57,188.25 : x
  2. Step 2: Convert to fraction form
    100,209.62/138,291.50 = 57,188.25/x
  3. Step 3: Cross multiply
    100,209.62x = 138,291.50 × 57,188.25
  4. Step 4: Simplify right side
    100,209.62x = 7,908,649,017.85
  5. Step 5: Solve for x
    x = 7,908,649,017.85/100,209.62
  6. Step 6: Final answer
    x = 78,921.05

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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.