Home / 100,013.40-138,036.96-64,248.12

Finding the Fourth Proportional to 100,013.40, 138,036.96 and 64,248.12

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Solution

The fourth proportional to 100,013.40, 138,036.96 and 64,248.12 is: 88,674.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,013.40 : 138,036.96 = 64,248.12 : x
  2. Step 2: Convert to fraction form
    100,013.40/138,036.96 = 64,248.12/x
  3. Step 3: Cross multiply
    100,013.40x = 138,036.96 × 64,248.12
  4. Step 4: Simplify right side
    100,013.40x = 8,868,615,170.52
  5. Step 5: Solve for x
    x = 8,868,615,170.52/100,013.40
  6. Step 6: Final answer
    x = 88,674.27

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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.