Home / 78,921.63-108,909.09-47,074.05

Finding the Fourth Proportional to 78,921.63, 108,909.09 and 47,074.05

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Solution

The fourth proportional to 78,921.63, 108,909.09 and 47,074.05 is: 64,960.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,921.63 : 108,909.09 = 47,074.05 : x
  2. Step 2: Convert to fraction form
    78,921.63/108,909.09 = 47,074.05/x
  3. Step 3: Cross multiply
    78,921.63x = 108,909.09 × 47,074.05
  4. Step 4: Simplify right side
    78,921.63x = 5,126,791,948.11
  5. Step 5: Solve for x
    x = 5,126,791,948.11/78,921.63
  6. Step 6: Final answer
    x = 64,960.54

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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.