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Finding the Fourth Proportional to 245,341.12, 367,998.72 and 79,129.12

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Solution

The fourth proportional to 245,341.12, 367,998.72 and 79,129.12 is: 118,689.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,341.12 : 367,998.72 = 79,129.12 : x
  2. Step 2: Convert to fraction form
    245,341.12/367,998.72 = 79,129.12/x
  3. Step 3: Cross multiply
    245,341.12x = 367,998.72 × 79,129.12
  4. Step 4: Simplify right side
    245,341.12x = 29,119,414,874.73
  5. Step 5: Solve for x
    x = 29,119,414,874.73/245,341.12
  6. Step 6: Final answer
    x = 118,689.50

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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.