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Finding the Fourth Proportional to 66,688.56, 91,995.48 and 39,822.48

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Solution

The fourth proportional to 66,688.56, 91,995.48 and 39,822.48 is: 54,934.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,688.56 : 91,995.48 = 39,822.48 : x
  2. Step 2: Convert to fraction form
    66,688.56/91,995.48 = 39,822.48/x
  3. Step 3: Cross multiply
    66,688.56x = 91,995.48 × 39,822.48
  4. Step 4: Simplify right side
    66,688.56x = 3,663,488,162.39
  5. Step 5: Solve for x
    x = 3,663,488,162.39/66,688.56
  6. Step 6: Final answer
    x = 54,934.28

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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.