Home / 99,781.88-137,722.64-57,365.04

Finding the Fourth Proportional to 99,781.88, 137,722.64 and 57,365.04

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Solution

The fourth proportional to 99,781.88, 137,722.64 and 57,365.04 is: 79,177.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,781.88 : 137,722.64 = 57,365.04 : x
  2. Step 2: Convert to fraction form
    99,781.88/137,722.64 = 57,365.04/x
  3. Step 3: Cross multiply
    99,781.88x = 137,722.64 × 57,365.04
  4. Step 4: Simplify right side
    99,781.88x = 7,900,464,752.51
  5. Step 5: Solve for x
    x = 7,900,464,752.51/99,781.88
  6. Step 6: Final answer
    x = 79,177.35

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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.