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Finding the Fourth Proportional to 100,261.60, 138,360.72 and 55,549.60

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Solution

The fourth proportional to 100,261.60, 138,360.72 and 55,549.60 is: 76,658.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,261.60 : 138,360.72 = 55,549.60 : x
  2. Step 2: Convert to fraction form
    100,261.60/138,360.72 = 55,549.60/x
  3. Step 3: Cross multiply
    100,261.60x = 138,360.72 × 55,549.60
  4. Step 4: Simplify right side
    100,261.60x = 7,685,882,651.71
  5. Step 5: Solve for x
    x = 7,685,882,651.71/100,261.60
  6. Step 6: Final answer
    x = 76,658.29

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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.