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Finding the Fourth Proportional to 79,212.81, 109,295.95 and 45,210.43

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Solution

The fourth proportional to 79,212.81, 109,295.95 and 45,210.43 is: 62,380.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,212.81 : 109,295.95 = 45,210.43 : x
  2. Step 2: Convert to fraction form
    79,212.81/109,295.95 = 45,210.43/x
  3. Step 3: Cross multiply
    79,212.81x = 109,295.95 × 45,210.43
  4. Step 4: Simplify right side
    79,212.81x = 4,941,316,783.73
  5. Step 5: Solve for x
    x = 4,941,316,783.73/79,212.81
  6. Step 6: Final answer
    x = 62,380.27

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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.