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Finding the Fourth Proportional to 100,334.97, 138,555.99 and 64,587.11

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Solution

The fourth proportional to 100,334.97, 138,555.99 and 64,587.11 is: 89,190.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,334.97 : 138,555.99 = 64,587.11 : x
  2. Step 2: Convert to fraction form
    100,334.97/138,555.99 = 64,587.11/x
  3. Step 3: Cross multiply
    100,334.97x = 138,555.99 × 64,587.11
  4. Step 4: Simplify right side
    100,334.97x = 8,948,930,274.51
  5. Step 5: Solve for x
    x = 8,948,930,274.51/100,334.97
  6. Step 6: Final answer
    x = 89,190.54

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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.