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Finding the Fourth Proportional to 117,689.16, 162,418.59 and 66,011.11

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Solution

The fourth proportional to 117,689.16, 162,418.59 and 66,011.11 is: 91,099.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,689.16 : 162,418.59 = 66,011.11 : x
  2. Step 2: Convert to fraction form
    117,689.16/162,418.59 = 66,011.11/x
  3. Step 3: Cross multiply
    117,689.16x = 162,418.59 × 66,011.11
  4. Step 4: Simplify right side
    117,689.16x = 10,721,430,268.39
  5. Step 5: Solve for x
    x = 10,721,430,268.39/117,689.16
  6. Step 6: Final answer
    x = 91,099.56

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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.