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Finding the Fourth Proportional to 72,873.98, 109,307.46 and 20,282.30

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Solution

The fourth proportional to 72,873.98, 109,307.46 and 20,282.30 is: 30,422.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,873.98 : 109,307.46 = 20,282.30 : x
  2. Step 2: Convert to fraction form
    72,873.98/109,307.46 = 20,282.30/x
  3. Step 3: Cross multiply
    72,873.98x = 109,307.46 × 20,282.30
  4. Step 4: Simplify right side
    72,873.98x = 2,217,006,695.96
  5. Step 5: Solve for x
    x = 2,217,006,695.96/72,873.98
  6. Step 6: Final answer
    x = 30,422.47

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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.