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Finding the Fourth Proportional to 66,563.98, 99,760.42 and 57,980.19

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Solution

The fourth proportional to 66,563.98, 99,760.42 and 57,980.19 is: 86,895.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,563.98 : 99,760.42 = 57,980.19 : x
  2. Step 2: Convert to fraction form
    66,563.98/99,760.42 = 57,980.19/x
  3. Step 3: Cross multiply
    66,563.98x = 99,760.42 × 57,980.19
  4. Step 4: Simplify right side
    66,563.98x = 5,784,128,552.66
  5. Step 5: Solve for x
    x = 5,784,128,552.66/66,563.98
  6. Step 6: Final answer
    x = 86,895.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.