Home / 78,987.74-109,003.07-43,177.89

Finding the Fourth Proportional to 78,987.74, 109,003.07 and 43,177.89

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Solution

The fourth proportional to 78,987.74, 109,003.07 and 43,177.89 is: 59,585.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,987.74 : 109,003.07 = 43,177.89 : x
  2. Step 2: Convert to fraction form
    78,987.74/109,003.07 = 43,177.89/x
  3. Step 3: Cross multiply
    78,987.74x = 109,003.07 × 43,177.89
  4. Step 4: Simplify right side
    78,987.74x = 4,706,522,226.81
  5. Step 5: Solve for x
    x = 4,706,522,226.81/78,987.74
  6. Step 6: Final answer
    x = 59,585.48

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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.