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Finding the Fourth Proportional to 84,488.94, 126,128.07 and 78,584.04

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Solution

The fourth proportional to 84,488.94, 126,128.07 and 78,584.04 is: 117,313.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,488.94 : 126,128.07 = 78,584.04 : x
  2. Step 2: Convert to fraction form
    84,488.94/126,128.07 = 78,584.04/x
  3. Step 3: Cross multiply
    84,488.94x = 126,128.07 × 78,584.04
  4. Step 4: Simplify right side
    84,488.94x = 9,911,653,298.00
  5. Step 5: Solve for x
    x = 9,911,653,298.00/84,488.94
  6. Step 6: Final answer
    x = 117,313.03

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.