Home / 90,743.20-136,114.80-48,752.80

Finding the Fourth Proportional to 90,743.20, 136,114.80 and 48,752.80

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Solution

The fourth proportional to 90,743.20, 136,114.80 and 48,752.80 is: 73,129.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,743.20 : 136,114.80 = 48,752.80 : x
  2. Step 2: Convert to fraction form
    90,743.20/136,114.80 = 48,752.80/x
  3. Step 3: Cross multiply
    90,743.20x = 136,114.80 × 48,752.80
  4. Step 4: Simplify right side
    90,743.20x = 6,635,977,621.44
  5. Step 5: Solve for x
    x = 6,635,977,621.44/90,743.20
  6. Step 6: Final answer
    x = 73,129.20

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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.