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Finding the Fourth Proportional to 139,506.34, 209,265 and 72,901.24

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Solution

The fourth proportional to 139,506.34, 209,265 and 72,901.24 is: 109,354.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,506.34 : 209,265 = 72,901.24 : x
  2. Step 2: Convert to fraction form
    139,506.34/209,265 = 72,901.24/x
  3. Step 3: Cross multiply
    139,506.34x = 209,265 × 72,901.24
  4. Step 4: Simplify right side
    139,506.34x = 15,255,677,988.60
  5. Step 5: Solve for x
    x = 15,255,677,988.60/139,506.34
  6. Step 6: Final answer
    x = 109,354.73

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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.