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Finding the Fourth Proportional to 100,872.56, 139,202.96 and 55,549.60

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Solution

The fourth proportional to 100,872.56, 139,202.96 and 55,549.60 is: 76,657.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,872.56 : 139,202.96 = 55,549.60 : x
  2. Step 2: Convert to fraction form
    100,872.56/139,202.96 = 55,549.60/x
  3. Step 3: Cross multiply
    100,872.56x = 139,202.96 × 55,549.60
  4. Step 4: Simplify right side
    100,872.56x = 7,732,668,746.82
  5. Step 5: Solve for x
    x = 7,732,668,746.82/100,872.56
  6. Step 6: Final answer
    x = 76,657.80

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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.