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Finding the Fourth Proportional to 66,486.78, 91,742.67 and 38,192.46

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Solution

The fourth proportional to 66,486.78, 91,742.67 and 38,192.46 is: 52,700.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,486.78 : 91,742.67 = 38,192.46 : x
  2. Step 2: Convert to fraction form
    66,486.78/91,742.67 = 38,192.46/x
  3. Step 3: Cross multiply
    66,486.78x = 91,742.67 × 38,192.46
  4. Step 4: Simplify right side
    66,486.78x = 3,503,878,254.27
  5. Step 5: Solve for x
    x = 3,503,878,254.27/66,486.78
  6. Step 6: Final answer
    x = 52,700.38

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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.