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Finding the Fourth Proportional to 75,219.40, 112,829.10 and 19,815.40

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Solution

The fourth proportional to 75,219.40, 112,829.10 and 19,815.40 is: 29,723.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,219.40 : 112,829.10 = 19,815.40 : x
  2. Step 2: Convert to fraction form
    75,219.40/112,829.10 = 19,815.40/x
  3. Step 3: Cross multiply
    75,219.40x = 112,829.10 × 19,815.40
  4. Step 4: Simplify right side
    75,219.40x = 2,235,753,748.14
  5. Step 5: Solve for x
    x = 2,235,753,748.14/75,219.40
  6. Step 6: Final answer
    x = 29,723.10

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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.