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Finding the Fourth Proportional to 82,803.70, 124,205.55 and 20,474.20

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Solution

The fourth proportional to 82,803.70, 124,205.55 and 20,474.20 is: 30,711.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,803.70 : 124,205.55 = 20,474.20 : x
  2. Step 2: Convert to fraction form
    82,803.70/124,205.55 = 20,474.20/x
  3. Step 3: Cross multiply
    82,803.70x = 124,205.55 × 20,474.20
  4. Step 4: Simplify right side
    82,803.70x = 2,543,009,271.81
  5. Step 5: Solve for x
    x = 2,543,009,271.81/82,803.70
  6. Step 6: Final answer
    x = 30,711.30

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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.