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Finding the Fourth Proportional to 117,689.59, 162,300 and 90,789.49

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Solution

The fourth proportional to 117,689.59, 162,300 and 90,789.49 is: 125,203.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,689.59 : 162,300 = 90,789.49 : x
  2. Step 2: Convert to fraction form
    117,689.59/162,300 = 90,789.49/x
  3. Step 3: Cross multiply
    117,689.59x = 162,300 × 90,789.49
  4. Step 4: Simplify right side
    117,689.59x = 14,735,134,227
  5. Step 5: Solve for x
    x = 14,735,134,227/117,689.59
  6. Step 6: Final answer
    x = 125,203.38

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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.