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Finding the Fourth Proportional to 128,614.60, 177,433.65 and 80,850.52

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Solution

The fourth proportional to 128,614.60, 177,433.65 and 80,850.52 is: 111,539.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,614.60 : 177,433.65 = 80,850.52 : x
  2. Step 2: Convert to fraction form
    128,614.60/177,433.65 = 80,850.52/x
  3. Step 3: Cross multiply
    128,614.60x = 177,433.65 × 80,850.52
  4. Step 4: Simplify right side
    128,614.60x = 14,345,602,868.00
  5. Step 5: Solve for x
    x = 14,345,602,868.00/128,614.60
  6. Step 6: Final answer
    x = 111,539.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.