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Finding the Fourth Proportional to 51,659.80, 77,489.70 and 42,911.80

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Solution

The fourth proportional to 51,659.80, 77,489.70 and 42,911.80 is: 64,367.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,659.80 : 77,489.70 = 42,911.80 : x
  2. Step 2: Convert to fraction form
    51,659.80/77,489.70 = 42,911.80/x
  3. Step 3: Cross multiply
    51,659.80x = 77,489.70 × 42,911.80
  4. Step 4: Simplify right side
    51,659.80x = 3,325,222,508.46
  5. Step 5: Solve for x
    x = 3,325,222,508.46/51,659.80
  6. Step 6: Final answer
    x = 64,367.70

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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.