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Finding the Fourth Proportional to 84,329.79, 126,494.69 and 28,159.53

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Solution

The fourth proportional to 84,329.79, 126,494.69 and 28,159.53 is: 42,239.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,329.79 : 126,494.69 = 28,159.53 : x
  2. Step 2: Convert to fraction form
    84,329.79/126,494.69 = 28,159.53/x
  3. Step 3: Cross multiply
    84,329.79x = 126,494.69 × 28,159.53
  4. Step 4: Simplify right side
    84,329.79x = 3,562,030,877.10
  5. Step 5: Solve for x
    x = 3,562,030,877.10/84,329.79
  6. Step 6: Final answer
    x = 42,239.30

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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.