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Finding the Fourth Proportional to 303,358.76, 455,045.16 and 78,728.04

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Solution

The fourth proportional to 303,358.76, 455,045.16 and 78,728.04 is: 118,093.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,358.76 : 455,045.16 = 78,728.04 : x
  2. Step 2: Convert to fraction form
    303,358.76/455,045.16 = 78,728.04/x
  3. Step 3: Cross multiply
    303,358.76x = 455,045.16 × 78,728.04
  4. Step 4: Simplify right side
    303,358.76x = 35,824,813,558.29
  5. Step 5: Solve for x
    x = 35,824,813,558.29/303,358.76
  6. Step 6: Final answer
    x = 118,093.88

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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.