Home / 155,044.20-213,958.26-87,061.72

Finding the Fourth Proportional to 155,044.20, 213,958.26 and 87,061.72

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Solution

The fourth proportional to 155,044.20, 213,958.26 and 87,061.72 is: 120,143.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,044.20 : 213,958.26 = 87,061.72 : x
  2. Step 2: Convert to fraction form
    155,044.20/213,958.26 = 87,061.72/x
  3. Step 3: Cross multiply
    155,044.20x = 213,958.26 × 87,061.72
  4. Step 4: Simplify right side
    155,044.20x = 18,627,574,123.81
  5. Step 5: Solve for x
    x = 18,627,574,123.81/155,044.20
  6. Step 6: Final answer
    x = 120,143.64

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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.