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Finding the Fourth Proportional to 77,560.88, 107,031.19 and 47,396.69

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Solution

The fourth proportional to 77,560.88, 107,031.19 and 47,396.69 is: 65,405.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,560.88 : 107,031.19 = 47,396.69 : x
  2. Step 2: Convert to fraction form
    77,560.88/107,031.19 = 47,396.69/x
  3. Step 3: Cross multiply
    77,560.88x = 107,031.19 × 47,396.69
  4. Step 4: Simplify right side
    77,560.88x = 5,072,923,360.62
  5. Step 5: Solve for x
    x = 5,072,923,360.62/77,560.88
  6. Step 6: Final answer
    x = 65,405.70

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1.5x scale

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.