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Finding the Fourth Proportional to 100,060.64, 138,023.52 and 66,069.44

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Solution

The fourth proportional to 100,060.64, 138,023.52 and 66,069.44 is: 91,136.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,060.64 : 138,023.52 = 66,069.44 : x
  2. Step 2: Convert to fraction form
    100,060.64/138,023.52 = 66,069.44/x
  3. Step 3: Cross multiply
    100,060.64x = 138,023.52 × 66,069.44
  4. Step 4: Simplify right side
    100,060.64x = 9,119,136,673.23
  5. Step 5: Solve for x
    x = 9,119,136,673.23/100,060.64
  6. Step 6: Final answer
    x = 91,136.10

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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.