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Finding the Fourth Proportional to 203,404.73, 280,810.25 and 138,970.85

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Solution

The fourth proportional to 203,404.73, 280,810.25 and 138,970.85 is: 191,856.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,404.73 : 280,810.25 = 138,970.85 : x
  2. Step 2: Convert to fraction form
    203,404.73/280,810.25 = 138,970.85/x
  3. Step 3: Cross multiply
    203,404.73x = 280,810.25 × 138,970.85
  4. Step 4: Simplify right side
    203,404.73x = 39,024,437,032.31
  5. Step 5: Solve for x
    x = 39,024,437,032.31/203,404.73
  6. Step 6: Final answer
    x = 191,856.10

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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.