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Finding the Fourth Proportional to 117,721.60, 176,428.80 and 54,534.40

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Solution

The fourth proportional to 117,721.60, 176,428.80 and 54,534.40 is: 81,730.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,721.60 : 176,428.80 = 54,534.40 : x
  2. Step 2: Convert to fraction form
    117,721.60/176,428.80 = 54,534.40/x
  3. Step 3: Cross multiply
    117,721.60x = 176,428.80 × 54,534.40
  4. Step 4: Simplify right side
    117,721.60x = 9,621,438,750.72
  5. Step 5: Solve for x
    x = 9,621,438,750.72/117,721.60
  6. Step 6: Final answer
    x = 81,730.44

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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.