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Finding the Fourth Proportional to 148,651.63, 205,139.39 and 84,990.76

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Solution

The fourth proportional to 148,651.63, 205,139.39 and 84,990.76 is: 117,287.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,651.63 : 205,139.39 = 84,990.76 : x
  2. Step 2: Convert to fraction form
    148,651.63/205,139.39 = 84,990.76/x
  3. Step 3: Cross multiply
    148,651.63x = 205,139.39 × 84,990.76
  4. Step 4: Simplify right side
    148,651.63x = 17,434,952,662.04
  5. Step 5: Solve for x
    x = 17,434,952,662.04/148,651.63
  6. Step 6: Final answer
    x = 117,287.33

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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.