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Finding the Fourth Proportional to 66,218.97, 98,704.65 and 60,904.56

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Solution

The fourth proportional to 66,218.97, 98,704.65 and 60,904.56 is: 90,783.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,218.97 : 98,704.65 = 60,904.56 : x
  2. Step 2: Convert to fraction form
    66,218.97/98,704.65 = 60,904.56/x
  3. Step 3: Cross multiply
    66,218.97x = 98,704.65 × 60,904.56
  4. Step 4: Simplify right side
    66,218.97x = 6,011,563,278.20
  5. Step 5: Solve for x
    x = 6,011,563,278.20/66,218.97
  6. Step 6: Final answer
    x = 90,783.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.