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Finding the Fourth Proportional to 84,435.72, 126,798.45 and 74,969.42

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Solution

The fourth proportional to 84,435.72, 126,798.45 and 74,969.42 is: 112,582.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,435.72 : 126,798.45 = 74,969.42 : x
  2. Step 2: Convert to fraction form
    84,435.72/126,798.45 = 74,969.42/x
  3. Step 3: Cross multiply
    84,435.72x = 126,798.45 × 74,969.42
  4. Step 4: Simplify right side
    84,435.72x = 9,506,005,338.27
  5. Step 5: Solve for x
    x = 9,506,005,338.27/84,435.72
  6. Step 6: Final answer
    x = 112,582.75

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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.