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Finding the Fourth Proportional to 81,703.80, 122,555.70 and 34,961.40

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Solution

The fourth proportional to 81,703.80, 122,555.70 and 34,961.40 is: 52,442.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,703.80 : 122,555.70 = 34,961.40 : x
  2. Step 2: Convert to fraction form
    81,703.80/122,555.70 = 34,961.40/x
  3. Step 3: Cross multiply
    81,703.80x = 122,555.70 × 34,961.40
  4. Step 4: Simplify right side
    81,703.80x = 4,284,718,849.98
  5. Step 5: Solve for x
    x = 4,284,718,849.98/81,703.80
  6. Step 6: Final answer
    x = 52,442.10

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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.