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Finding the Fourth Proportional to 78,564.96, 117,965.52 and 67,590.96

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Solution

The fourth proportional to 78,564.96, 117,965.52 and 67,590.96 is: 101,488.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,564.96 : 117,965.52 = 67,590.96 : x
  2. Step 2: Convert to fraction form
    78,564.96/117,965.52 = 67,590.96/x
  3. Step 3: Cross multiply
    78,564.96x = 117,965.52 × 67,590.96
  4. Step 4: Simplify right side
    78,564.96x = 7,973,402,743.70
  5. Step 5: Solve for x
    x = 7,973,402,743.70/78,564.96
  6. Step 6: Final answer
    x = 101,488.03

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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.