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Finding the Fourth Proportional to 66,505.50, 91,776.78 and 38,208.96

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Solution

The fourth proportional to 66,505.50, 91,776.78 and 38,208.96 is: 52,727.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,505.50 : 91,776.78 = 38,208.96 : x
  2. Step 2: Convert to fraction form
    66,505.50/91,776.78 = 38,208.96/x
  3. Step 3: Cross multiply
    66,505.50x = 91,776.78 × 38,208.96
  4. Step 4: Simplify right side
    66,505.50x = 3,506,695,315.95
  5. Step 5: Solve for x
    x = 3,506,695,315.95/66,505.50
  6. Step 6: Final answer
    x = 52,727.90

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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.