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Finding the Fourth Proportional to 139,572.70, 209,360.34 and 39,732.88

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Solution

The fourth proportional to 139,572.70, 209,360.34 and 39,732.88 is: 59,599.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,572.70 : 209,360.34 = 39,732.88 : x
  2. Step 2: Convert to fraction form
    139,572.70/209,360.34 = 39,732.88/x
  3. Step 3: Cross multiply
    139,572.70x = 209,360.34 × 39,732.88
  4. Step 4: Simplify right side
    139,572.70x = 8,318,488,219.18
  5. Step 5: Solve for x
    x = 8,318,488,219.18/139,572.70
  6. Step 6: Final answer
    x = 59,599.68

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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.