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Finding the Fourth Proportional to 100,560.56, 138,820.74 and 58,110.80

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Solution

The fourth proportional to 100,560.56, 138,820.74 and 58,110.80 is: 80,220.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,560.56 : 138,820.74 = 58,110.80 : x
  2. Step 2: Convert to fraction form
    100,560.56/138,820.74 = 58,110.80/x
  3. Step 3: Cross multiply
    100,560.56x = 138,820.74 × 58,110.80
  4. Step 4: Simplify right side
    100,560.56x = 8,066,984,257.99
  5. Step 5: Solve for x
    x = 8,066,984,257.99/100,560.56
  6. Step 6: Final answer
    x = 80,220.16

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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.