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Finding the Fourth Proportional to 77,125.20, 115,687.80 and 47,576.40

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Solution

The fourth proportional to 77,125.20, 115,687.80 and 47,576.40 is: 71,364.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,125.20 : 115,687.80 = 47,576.40 : x
  2. Step 2: Convert to fraction form
    77,125.20/115,687.80 = 47,576.40/x
  3. Step 3: Cross multiply
    77,125.20x = 115,687.80 × 47,576.40
  4. Step 4: Simplify right side
    77,125.20x = 5,504,009,047.92
  5. Step 5: Solve for x
    x = 5,504,009,047.92/77,125.20
  6. Step 6: Final answer
    x = 71,364.60

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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.