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Finding the Fourth Proportional to 77,900.45, 107,449.10 and 47,700.71

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Solution

The fourth proportional to 77,900.45, 107,449.10 and 47,700.71 is: 65,794.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,900.45 : 107,449.10 = 47,700.71 : x
  2. Step 2: Convert to fraction form
    77,900.45/107,449.10 = 47,700.71/x
  3. Step 3: Cross multiply
    77,900.45x = 107,449.10 × 47,700.71
  4. Step 4: Simplify right side
    77,900.45x = 5,125,398,164.92
  5. Step 5: Solve for x
    x = 5,125,398,164.92/77,900.45
  6. Step 6: Final answer
    x = 65,794.21

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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.