Home / 100,376.30-138,171.56-86,758.10

Finding the Fourth Proportional to 100,376.30, 138,171.56 and 86,758.10

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Solution

The fourth proportional to 100,376.30, 138,171.56 and 86,758.10 is: 119,425.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,376.30 : 138,171.56 = 86,758.10 : x
  2. Step 2: Convert to fraction form
    100,376.30/138,171.56 = 86,758.10/x
  3. Step 3: Cross multiply
    100,376.30x = 138,171.56 × 86,758.10
  4. Step 4: Simplify right side
    100,376.30x = 11,987,502,019.64
  5. Step 5: Solve for x
    x = 11,987,502,019.64/100,376.30
  6. Step 6: Final answer
    x = 119,425.62

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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.