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Finding the Fourth Proportional to 76,674.20, 105,773.04 and 66,045.38

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Solution

The fourth proportional to 76,674.20, 105,773.04 and 66,045.38 is: 91,110.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,674.20 : 105,773.04 = 66,045.38 : x
  2. Step 2: Convert to fraction form
    76,674.20/105,773.04 = 66,045.38/x
  3. Step 3: Cross multiply
    76,674.20x = 105,773.04 × 66,045.38
  4. Step 4: Simplify right side
    76,674.20x = 6,985,820,091.69
  5. Step 5: Solve for x
    x = 6,985,820,091.69/76,674.20
  6. Step 6: Final answer
    x = 91,110.45

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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.