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Finding the Fourth Proportional to 81,641.80, 122,462.70 and 34,899.40

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Solution

The fourth proportional to 81,641.80, 122,462.70 and 34,899.40 is: 52,349.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,641.80 : 122,462.70 = 34,899.40 : x
  2. Step 2: Convert to fraction form
    81,641.80/122,462.70 = 34,899.40/x
  3. Step 3: Cross multiply
    81,641.80x = 122,462.70 × 34,899.40
  4. Step 4: Simplify right side
    81,641.80x = 4,273,874,752.38
  5. Step 5: Solve for x
    x = 4,273,874,752.38/81,641.80
  6. Step 6: Final answer
    x = 52,349.10

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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.