Home / 100,197.14-138,365.72-64,449.20

Finding the Fourth Proportional to 100,197.14, 138,365.72 and 64,449.20

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Solution

The fourth proportional to 100,197.14, 138,365.72 and 64,449.20 is: 89,000.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,197.14 : 138,365.72 = 64,449.20 : x
  2. Step 2: Convert to fraction form
    100,197.14/138,365.72 = 64,449.20/x
  3. Step 3: Cross multiply
    100,197.14x = 138,365.72 × 64,449.20
  4. Step 4: Simplify right side
    100,197.14x = 8,917,558,947.35
  5. Step 5: Solve for x
    x = 8,917,558,947.35/100,197.14
  6. Step 6: Final answer
    x = 89,000.14

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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.