Home / 142,788.30-213,721.65-131,729.10

Finding the Fourth Proportional to 142,788.30, 213,721.65 and 131,729.10

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Solution

The fourth proportional to 142,788.30, 213,721.65 and 131,729.10 is: 197,168.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,788.30 : 213,721.65 = 131,729.10 : x
  2. Step 2: Convert to fraction form
    142,788.30/213,721.65 = 131,729.10/x
  3. Step 3: Cross multiply
    142,788.30x = 213,721.65 × 131,729.10
  4. Step 4: Simplify right side
    142,788.30x = 28,153,360,605.02
  5. Step 5: Solve for x
    x = 28,153,360,605.02/142,788.30
  6. Step 6: Final answer
    x = 197,168.54

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.