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Finding the Fourth Proportional to 52,080.95, 78,125.07 and 20,916.20

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Solution

The fourth proportional to 52,080.95, 78,125.07 and 20,916.20 is: 31,375.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,080.95 : 78,125.07 = 20,916.20 : x
  2. Step 2: Convert to fraction form
    52,080.95/78,125.07 = 20,916.20/x
  3. Step 3: Cross multiply
    52,080.95x = 78,125.07 × 20,916.20
  4. Step 4: Simplify right side
    52,080.95x = 1,634,079,198.51
  5. Step 5: Solve for x
    x = 1,634,079,198.51/52,080.95
  6. Step 6: Final answer
    x = 31,375.76

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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.