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Finding the Fourth Proportional to 82,951.70, 124,428.01 and 20,622.20

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Solution

The fourth proportional to 82,951.70, 124,428.01 and 20,622.20 is: 30,933.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,951.70 : 124,428.01 = 20,622.20 : x
  2. Step 2: Convert to fraction form
    82,951.70/124,428.01 = 20,622.20/x
  3. Step 3: Cross multiply
    82,951.70x = 124,428.01 × 20,622.20
  4. Step 4: Simplify right side
    82,951.70x = 2,565,979,307.82
  5. Step 5: Solve for x
    x = 2,565,979,307.82/82,951.70
  6. Step 6: Final answer
    x = 30,933.41

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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.