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Finding the Fourth Proportional to 136,266.66, 188,032.29 and 78,907.11

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Solution

The fourth proportional to 136,266.66, 188,032.29 and 78,907.11 is: 108,882.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,266.66 : 188,032.29 = 78,907.11 : x
  2. Step 2: Convert to fraction form
    136,266.66/188,032.29 = 78,907.11/x
  3. Step 3: Cross multiply
    136,266.66x = 188,032.29 × 78,907.11
  4. Step 4: Simplify right side
    136,266.66x = 14,837,084,590.58
  5. Step 5: Solve for x
    x = 14,837,084,590.58/136,266.66
  6. Step 6: Final answer
    x = 108,882.72

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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.