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Finding the Fourth Proportional to 117,639.20, 176,534.40 and 65,086.40

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Solution

The fourth proportional to 117,639.20, 176,534.40 and 65,086.40 is: 97,671.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,639.20 : 176,534.40 = 65,086.40 : x
  2. Step 2: Convert to fraction form
    117,639.20/176,534.40 = 65,086.40/x
  3. Step 3: Cross multiply
    117,639.20x = 176,534.40 × 65,086.40
  4. Step 4: Simplify right side
    117,639.20x = 11,489,988,572.16
  5. Step 5: Solve for x
    x = 11,489,988,572.16/117,639.20
  6. Step 6: Final answer
    x = 97,671.43

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.