Home / 79,688.64-109,966.20-43,871.72

Finding the Fourth Proportional to 79,688.64, 109,966.20 and 43,871.72

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Solution

The fourth proportional to 79,688.64, 109,966.20 and 43,871.72 is: 60,540.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,688.64 : 109,966.20 = 43,871.72 : x
  2. Step 2: Convert to fraction form
    79,688.64/109,966.20 = 43,871.72/x
  3. Step 3: Cross multiply
    79,688.64x = 109,966.20 × 43,871.72
  4. Step 4: Simplify right side
    79,688.64x = 4,824,406,335.86
  5. Step 5: Solve for x
    x = 4,824,406,335.86/79,688.64
  6. Step 6: Final answer
    x = 60,540.70

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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.