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Finding the Fourth Proportional to 76,339.60, 114,510.20 and 20,935.60

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Solution

The fourth proportional to 76,339.60, 114,510.20 and 20,935.60 is: 31,403.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,339.60 : 114,510.20 = 20,935.60 : x
  2. Step 2: Convert to fraction form
    76,339.60/114,510.20 = 20,935.60/x
  3. Step 3: Cross multiply
    76,339.60x = 114,510.20 × 20,935.60
  4. Step 4: Simplify right side
    76,339.60x = 2,397,339,743.12
  5. Step 5: Solve for x
    x = 2,397,339,743.12/76,339.60
  6. Step 6: Final answer
    x = 31,403.62

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1.5x scale

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.