Home / 155,042.40-213,958.56-87,049.92

Finding the Fourth Proportional to 155,042.40, 213,958.56 and 87,049.92

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Solution

The fourth proportional to 155,042.40, 213,958.56 and 87,049.92 is: 120,128.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,042.40 : 213,958.56 = 87,049.92 : x
  2. Step 2: Convert to fraction form
    155,042.40/213,958.56 = 87,049.92/x
  3. Step 3: Cross multiply
    155,042.40x = 213,958.56 × 87,049.92
  4. Step 4: Simplify right side
    155,042.40x = 18,625,075,531.32
  5. Step 5: Solve for x
    x = 18,625,075,531.32/155,042.40
  6. Step 6: Final answer
    x = 120,128.92

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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.