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Finding the Fourth Proportional to 79,333.78, 109,490.31 and 45,343.70

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Solution

The fourth proportional to 79,333.78, 109,490.31 and 45,343.70 is: 62,579.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,333.78 : 109,490.31 = 45,343.70 : x
  2. Step 2: Convert to fraction form
    79,333.78/109,490.31 = 45,343.70/x
  3. Step 3: Cross multiply
    79,333.78x = 109,490.31 × 45,343.70
  4. Step 4: Simplify right side
    79,333.78x = 4,964,695,462.65
  5. Step 5: Solve for x
    x = 4,964,695,462.65/79,333.78
  6. Step 6: Final answer
    x = 62,579.84

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1.5x scale

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.