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Finding the Fourth Proportional to 66,685.36, 91,982.44 and 42,774.16

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Solution

The fourth proportional to 66,685.36, 91,982.44 and 42,774.16 is: 59,000.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,685.36 : 91,982.44 = 42,774.16 : x
  2. Step 2: Convert to fraction form
    66,685.36/91,982.44 = 42,774.16/x
  3. Step 3: Cross multiply
    66,685.36x = 91,982.44 × 42,774.16
  4. Step 4: Simplify right side
    66,685.36x = 3,934,471,605.75
  5. Step 5: Solve for x
    x = 3,934,471,605.75/66,685.36
  6. Step 6: Final answer
    x = 59,000.53

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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.