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Finding the Fourth Proportional to 66,572.31, 91,869.31 and 36,357.63

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Solution

The fourth proportional to 66,572.31, 91,869.31 and 36,357.63 is: 50,173.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,572.31 : 91,869.31 = 36,357.63 : x
  2. Step 2: Convert to fraction form
    66,572.31/91,869.31 = 36,357.63/x
  3. Step 3: Cross multiply
    66,572.31x = 91,869.31 × 36,357.63
  4. Step 4: Simplify right side
    66,572.31x = 3,340,150,959.68
  5. Step 5: Solve for x
    x = 3,340,150,959.68/66,572.31
  6. Step 6: Final answer
    x = 50,173.28

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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.