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Finding the Fourth Proportional to 132,689.81, 183,109.21 and 72,261.52

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Solution

The fourth proportional to 132,689.81, 183,109.21 and 72,261.52 is: 99,719.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,689.81 : 183,109.21 = 72,261.52 : x
  2. Step 2: Convert to fraction form
    132,689.81/183,109.21 = 72,261.52/x
  3. Step 3: Cross multiply
    132,689.81x = 183,109.21 × 72,261.52
  4. Step 4: Simplify right side
    132,689.81x = 13,231,749,202.17
  5. Step 5: Solve for x
    x = 13,231,749,202.17/132,689.81
  6. Step 6: Final answer
    x = 99,719.41

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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.