Home / 100,233.72-138,318.91-57,215.43

Finding the Fourth Proportional to 100,233.72, 138,318.91 and 57,215.43

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Solution

The fourth proportional to 100,233.72, 138,318.91 and 57,215.43 is: 78,955.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,233.72 : 138,318.91 = 57,215.43 : x
  2. Step 2: Convert to fraction form
    100,233.72/138,318.91 = 57,215.43/x
  3. Step 3: Cross multiply
    100,233.72x = 138,318.91 × 57,215.43
  4. Step 4: Simplify right side
    100,233.72x = 7,913,975,769.74
  5. Step 5: Solve for x
    x = 7,913,975,769.74/100,233.72
  6. Step 6: Final answer
    x = 78,955.22

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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.