Home / 128,975.14-193,287.73-72,787.46

Finding the Fourth Proportional to 128,975.14, 193,287.73 and 72,787.46

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Solution

The fourth proportional to 128,975.14, 193,287.73 and 72,787.46 is: 109,082.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,975.14 : 193,287.73 = 72,787.46 : x
  2. Step 2: Convert to fraction form
    128,975.14/193,287.73 = 72,787.46/x
  3. Step 3: Cross multiply
    128,975.14x = 193,287.73 × 72,787.46
  4. Step 4: Simplify right side
    128,975.14x = 14,068,922,551.93
  5. Step 5: Solve for x
    x = 14,068,922,551.93/128,975.14
  6. Step 6: Final answer
    x = 109,082.44

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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.