Home / 72,119.90-99,519.84-39,853.15

Finding the Fourth Proportional to 72,119.90, 99,519.84 and 39,853.15

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Solution

The fourth proportional to 72,119.90, 99,519.84 and 39,853.15 is: 54,994.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,119.90 : 99,519.84 = 39,853.15 : x
  2. Step 2: Convert to fraction form
    72,119.90/99,519.84 = 39,853.15/x
  3. Step 3: Cross multiply
    72,119.90x = 99,519.84 × 39,853.15
  4. Step 4: Simplify right side
    72,119.90x = 3,966,178,862.70
  5. Step 5: Solve for x
    x = 3,966,178,862.70/72,119.90
  6. Step 6: Final answer
    x = 54,994.23

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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.