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Finding the Fourth Proportional to 303,376.12, 455,060.53 and 78,716.55

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Solution

The fourth proportional to 303,376.12, 455,060.53 and 78,716.55 is: 118,073.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,376.12 : 455,060.53 = 78,716.55 : x
  2. Step 2: Convert to fraction form
    303,376.12/455,060.53 = 78,716.55/x
  3. Step 3: Cross multiply
    303,376.12x = 455,060.53 × 78,716.55
  4. Step 4: Simplify right side
    303,376.12x = 35,820,794,962.77
  5. Step 5: Solve for x
    x = 35,820,794,962.77/303,376.12
  6. Step 6: Final answer
    x = 118,073.88

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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.