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Finding the Fourth Proportional to 55,855.80, 77,080.14 and 30,704.76

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Solution

The fourth proportional to 55,855.80, 77,080.14 and 30,704.76 is: 42,372.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,855.80 : 77,080.14 = 30,704.76 : x
  2. Step 2: Convert to fraction form
    55,855.80/77,080.14 = 30,704.76/x
  3. Step 3: Cross multiply
    55,855.80x = 77,080.14 × 30,704.76
  4. Step 4: Simplify right side
    55,855.80x = 2,366,727,199.47
  5. Step 5: Solve for x
    x = 2,366,727,199.47/55,855.80
  6. Step 6: Final answer
    x = 42,372.09

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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.