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Finding the Fourth Proportional to 137,124.35, 188,839.17 and 128,580.67

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Solution

The fourth proportional to 137,124.35, 188,839.17 and 128,580.67 is: 177,073.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,124.35 : 188,839.17 = 128,580.67 : x
  2. Step 2: Convert to fraction form
    137,124.35/188,839.17 = 128,580.67/x
  3. Step 3: Cross multiply
    137,124.35x = 188,839.17 × 128,580.67
  4. Step 4: Simplify right side
    137,124.35x = 24,281,067,000.84
  5. Step 5: Solve for x
    x = 24,281,067,000.84/137,124.35
  6. Step 6: Final answer
    x = 177,073.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.