Home / 155,042.20-213,955.50-87,059.72

Finding the Fourth Proportional to 155,042.20, 213,955.50 and 87,059.72

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Solution

The fourth proportional to 155,042.20, 213,955.50 and 87,059.72 is: 120,140.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,042.20 : 213,955.50 = 87,059.72 : x
  2. Step 2: Convert to fraction form
    155,042.20/213,955.50 = 87,059.72/x
  3. Step 3: Cross multiply
    155,042.20x = 213,955.50 × 87,059.72
  4. Step 4: Simplify right side
    155,042.20x = 18,626,905,922.46
  5. Step 5: Solve for x
    x = 18,626,905,922.46/155,042.20
  6. Step 6: Final answer
    x = 120,140.88

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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.