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Finding the Fourth Proportional to 72,934.65, 109,420.44 and 20,344.14

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Solution

The fourth proportional to 72,934.65, 109,420.44 and 20,344.14 is: 30,521.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,934.65 : 109,420.44 = 20,344.14 : x
  2. Step 2: Convert to fraction form
    72,934.65/109,420.44 = 20,344.14/x
  3. Step 3: Cross multiply
    72,934.65x = 109,420.44 × 20,344.14
  4. Step 4: Simplify right side
    72,934.65x = 2,226,064,750.22
  5. Step 5: Solve for x
    x = 2,226,064,750.22/72,934.65
  6. Step 6: Final answer
    x = 30,521.36

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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.