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Finding the Fourth Proportional to 79,128.79, 109,194.99 and 45,148.27

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Solution

The fourth proportional to 79,128.79, 109,194.99 and 45,148.27 is: 62,303.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,128.79 : 109,194.99 = 45,148.27 : x
  2. Step 2: Convert to fraction form
    79,128.79/109,194.99 = 45,148.27/x
  3. Step 3: Cross multiply
    79,128.79x = 109,194.99 × 45,148.27
  4. Step 4: Simplify right side
    79,128.79x = 4,929,964,891.17
  5. Step 5: Solve for x
    x = 4,929,964,891.17/79,128.79
  6. Step 6: Final answer
    x = 62,303.05

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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.