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Finding the Fourth Proportional to 86,239.80, 129,359.73 and 38,799.48

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Solution

The fourth proportional to 86,239.80, 129,359.73 and 38,799.48 is: 58,199.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,239.80 : 129,359.73 = 38,799.48 : x
  2. Step 2: Convert to fraction form
    86,239.80/129,359.73 = 38,799.48/x
  3. Step 3: Cross multiply
    86,239.80x = 129,359.73 × 38,799.48
  4. Step 4: Simplify right side
    86,239.80x = 5,019,090,256.94
  5. Step 5: Solve for x
    x = 5,019,090,256.94/86,239.80
  6. Step 6: Final answer
    x = 58,199.23

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1.5x scale

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.