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Finding the Fourth Proportional to 138,006.90, 206,572.95 and 138,006.90

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Solution

The fourth proportional to 138,006.90, 206,572.95 and 138,006.90 is: 206,572.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,006.90 : 206,572.95 = 138,006.90 : x
  2. Step 2: Convert to fraction form
    138,006.90/206,572.95 = 138,006.90/x
  3. Step 3: Cross multiply
    138,006.90x = 206,572.95 × 138,006.90
  4. Step 4: Simplify right side
    138,006.90x = 28,508,492,453.36
  5. Step 5: Solve for x
    x = 28,508,492,453.36/138,006.90
  6. Step 6: Final answer
    x = 206,572.95

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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.