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Finding the Fourth Proportional to 99,791.04, 137,711.76 and 55,079.04

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Solution

The fourth proportional to 99,791.04, 137,711.76 and 55,079.04 is: 76,009.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,791.04 : 137,711.76 = 55,079.04 : x
  2. Step 2: Convert to fraction form
    99,791.04/137,711.76 = 55,079.04/x
  3. Step 3: Cross multiply
    99,791.04x = 137,711.76 × 55,079.04
  4. Step 4: Simplify right side
    99,791.04x = 7,585,031,537.51
  5. Step 5: Solve for x
    x = 7,585,031,537.51/99,791.04
  6. Step 6: Final answer
    x = 76,009.14

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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.