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Finding the Fourth Proportional to 65,279.50, 90,085.80 and 36,987.10

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Solution

The fourth proportional to 65,279.50, 90,085.80 and 36,987.10 is: 51,042.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,279.50 : 90,085.80 = 36,987.10 : x
  2. Step 2: Convert to fraction form
    65,279.50/90,085.80 = 36,987.10/x
  3. Step 3: Cross multiply
    65,279.50x = 90,085.80 × 36,987.10
  4. Step 4: Simplify right side
    65,279.50x = 3,332,012,493.18
  5. Step 5: Solve for x
    x = 3,332,012,493.18/65,279.50
  6. Step 6: Final answer
    x = 51,042.25

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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.