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Finding the Fourth Proportional to 139,638.76, 209,458.14 and 114,962.92

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Solution

The fourth proportional to 139,638.76, 209,458.14 and 114,962.92 is: 172,444.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,638.76 : 209,458.14 = 114,962.92 : x
  2. Step 2: Convert to fraction form
    139,638.76/209,458.14 = 114,962.92/x
  3. Step 3: Cross multiply
    139,638.76x = 209,458.14 × 114,962.92
  4. Step 4: Simplify right side
    139,638.76x = 24,079,919,392.17
  5. Step 5: Solve for x
    x = 24,079,919,392.17/139,638.76
  6. Step 6: Final answer
    x = 172,444.38

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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.