Home / 90,036.72-124,135.20-61,693.20

Finding the Fourth Proportional to 90,036.72, 124,135.20 and 61,693.20

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Solution

The fourth proportional to 90,036.72, 124,135.20 and 61,693.20 is: 85,057.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,036.72 : 124,135.20 = 61,693.20 : x
  2. Step 2: Convert to fraction form
    90,036.72/124,135.20 = 61,693.20/x
  3. Step 3: Cross multiply
    90,036.72x = 124,135.20 × 61,693.20
  4. Step 4: Simplify right side
    90,036.72x = 7,658,297,720.64
  5. Step 5: Solve for x
    x = 7,658,297,720.64/90,036.72
  6. Step 6: Final answer
    x = 85,057.49

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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.