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Finding the Fourth Proportional to 66,687.86, 92,019.02 and 38,388.08

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Solution

The fourth proportional to 66,687.86, 92,019.02 and 38,388.08 is: 52,969.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,687.86 : 92,019.02 = 38,388.08 : x
  2. Step 2: Convert to fraction form
    66,687.86/92,019.02 = 38,388.08/x
  3. Step 3: Cross multiply
    66,687.86x = 92,019.02 × 38,388.08
  4. Step 4: Simplify right side
    66,687.86x = 3,532,433,501.28
  5. Step 5: Solve for x
    x = 3,532,433,501.28/66,687.86
  6. Step 6: Final answer
    x = 52,969.66

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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.