Home / 142,388.13-213,476.75-86,215.04

Finding the Fourth Proportional to 142,388.13, 213,476.75 and 86,215.04

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Solution

The fourth proportional to 142,388.13, 213,476.75 and 86,215.04 is: 129,258.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,388.13 : 213,476.75 = 86,215.04 : x
  2. Step 2: Convert to fraction form
    142,388.13/213,476.75 = 86,215.04/x
  3. Step 3: Cross multiply
    142,388.13x = 213,476.75 × 86,215.04
  4. Step 4: Simplify right side
    142,388.13x = 18,404,906,165.71
  5. Step 5: Solve for x
    x = 18,404,906,165.71/142,388.13
  6. Step 6: Final answer
    x = 129,258.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.