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Finding the Fourth Proportional to 81,987.01, 122,702.76 and 50,417.07

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Solution

The fourth proportional to 81,987.01, 122,702.76 and 50,417.07 is: 75,454.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,987.01 : 122,702.76 = 50,417.07 : x
  2. Step 2: Convert to fraction form
    81,987.01/122,702.76 = 50,417.07/x
  3. Step 3: Cross multiply
    81,987.01x = 122,702.76 × 50,417.07
  4. Step 4: Simplify right side
    81,987.01x = 6,186,313,640.11
  5. Step 5: Solve for x
    x = 6,186,313,640.11/81,987.01
  6. Step 6: Final answer
    x = 75,454.80

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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.