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Finding the Fourth Proportional to 100,657.59, 138,910.16 and 54,720.33

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Solution

The fourth proportional to 100,657.59, 138,910.16 and 54,720.33 is: 75,515.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,657.59 : 138,910.16 = 54,720.33 : x
  2. Step 2: Convert to fraction form
    100,657.59/138,910.16 = 54,720.33/x
  3. Step 3: Cross multiply
    100,657.59x = 138,910.16 × 54,720.33
  4. Step 4: Simplify right side
    100,657.59x = 7,601,208,827.40
  5. Step 5: Solve for x
    x = 7,601,208,827.40/100,657.59
  6. Step 6: Final answer
    x = 75,515.51

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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.