Home / 133,120.28-183,706.32-72,691.40

Finding the Fourth Proportional to 133,120.28, 183,706.32 and 72,691.40

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Solution

The fourth proportional to 133,120.28, 183,706.32 and 72,691.40 is: 100,314.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,120.28 : 183,706.32 = 72,691.40 : x
  2. Step 2: Convert to fraction form
    133,120.28/183,706.32 = 72,691.40/x
  3. Step 3: Cross multiply
    133,120.28x = 183,706.32 × 72,691.40
  4. Step 4: Simplify right side
    133,120.28x = 13,353,869,589.65
  5. Step 5: Solve for x
    x = 13,353,869,589.65/133,120.28
  6. Step 6: Final answer
    x = 100,314.31

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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.