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Finding the Fourth Proportional to 100,079.52, 138,132.80 and 66,094.72

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Solution

The fourth proportional to 100,079.52, 138,132.80 and 66,094.72 is: 91,225.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,079.52 : 138,132.80 = 66,094.72 : x
  2. Step 2: Convert to fraction form
    100,079.52/138,132.80 = 66,094.72/x
  3. Step 3: Cross multiply
    100,079.52x = 138,132.80 × 66,094.72
  4. Step 4: Simplify right side
    100,079.52x = 9,129,848,738.82
  5. Step 5: Solve for x
    x = 9,129,848,738.82/100,079.52
  6. Step 6: Final answer
    x = 91,225.94

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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.