Home / 77,987.10-107,622.24-42,177.11

Finding the Fourth Proportional to 77,987.10, 107,622.24 and 42,177.11

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Solution

The fourth proportional to 77,987.10, 107,622.24 and 42,177.11 is: 58,204.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,987.10 : 107,622.24 = 42,177.11 : x
  2. Step 2: Convert to fraction form
    77,987.10/107,622.24 = 42,177.11/x
  3. Step 3: Cross multiply
    77,987.10x = 107,622.24 × 42,177.11
  4. Step 4: Simplify right side
    77,987.10x = 4,539,194,358.65
  5. Step 5: Solve for x
    x = 4,539,194,358.65/77,987.10
  6. Step 6: Final answer
    x = 58,204.42

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1.5x scale

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.