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Finding the Fourth Proportional to 116,530.79, 174,515.80 and 78,976.92

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Solution

The fourth proportional to 116,530.79, 174,515.80 and 78,976.92 is: 118,275.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    116,530.79 : 174,515.80 = 78,976.92 : x
  2. Step 2: Convert to fraction form
    116,530.79/174,515.80 = 78,976.92/x
  3. Step 3: Cross multiply
    116,530.79x = 174,515.80 × 78,976.92
  4. Step 4: Simplify right side
    116,530.79x = 13,782,719,107.87
  5. Step 5: Solve for x
    x = 13,782,719,107.87/116,530.79
  6. Step 6: Final answer
    x = 118,275.35

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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.