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Finding the Fourth Proportional to 98,126.88, 135,455.72 and 66,338.88

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Solution

The fourth proportional to 98,126.88, 135,455.72 and 66,338.88 is: 91,575.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,126.88 : 135,455.72 = 66,338.88 : x
  2. Step 2: Convert to fraction form
    98,126.88/135,455.72 = 66,338.88/x
  3. Step 3: Cross multiply
    98,126.88x = 135,455.72 × 66,338.88
  4. Step 4: Simplify right side
    98,126.88x = 8,985,980,754.39
  5. Step 5: Solve for x
    x = 8,985,980,754.39/98,126.88
  6. Step 6: Final answer
    x = 91,575.12

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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.