Home / 77,109.20-115,663.80-47,560.40

Finding the Fourth Proportional to 77,109.20, 115,663.80 and 47,560.40

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Solution

The fourth proportional to 77,109.20, 115,663.80 and 47,560.40 is: 71,340.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,109.20 : 115,663.80 = 47,560.40 : x
  2. Step 2: Convert to fraction form
    77,109.20/115,663.80 = 47,560.40/x
  3. Step 3: Cross multiply
    77,109.20x = 115,663.80 × 47,560.40
  4. Step 4: Simplify right side
    77,109.20x = 5,501,016,593.52
  5. Step 5: Solve for x
    x = 5,501,016,593.52/77,109.20
  6. Step 6: Final answer
    x = 71,340.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.