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Finding the Fourth Proportional to 139,419.80, 209,139.94 and 39,588.04

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Solution

The fourth proportional to 139,419.80, 209,139.94 and 39,588.04 is: 59,384.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,419.80 : 209,139.94 = 39,588.04 : x
  2. Step 2: Convert to fraction form
    139,419.80/209,139.94 = 39,588.04/x
  3. Step 3: Cross multiply
    139,419.80x = 209,139.94 × 39,588.04
  4. Step 4: Simplify right side
    139,419.80x = 8,279,440,621.23
  5. Step 5: Solve for x
    x = 8,279,440,621.23/139,419.80
  6. Step 6: Final answer
    x = 59,384.97

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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.