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Finding the Fourth Proportional to 117,158.40, 175,737.60 and 72,921.60

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Solution

The fourth proportional to 117,158.40, 175,737.60 and 72,921.60 is: 109,382.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,158.40 : 175,737.60 = 72,921.60 : x
  2. Step 2: Convert to fraction form
    117,158.40/175,737.60 = 72,921.60/x
  3. Step 3: Cross multiply
    117,158.40x = 175,737.60 × 72,921.60
  4. Step 4: Simplify right side
    117,158.40x = 12,815,066,972.16
  5. Step 5: Solve for x
    x = 12,815,066,972.16/117,158.40
  6. Step 6: Final answer
    x = 109,382.40

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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.