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Finding the Fourth Proportional to 128,048.18, 176,716.50 and 71,468.06

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Solution

The fourth proportional to 128,048.18, 176,716.50 and 71,468.06 is: 98,631.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,048.18 : 176,716.50 = 71,468.06 : x
  2. Step 2: Convert to fraction form
    128,048.18/176,716.50 = 71,468.06/x
  3. Step 3: Cross multiply
    128,048.18x = 176,716.50 × 71,468.06
  4. Step 4: Simplify right side
    128,048.18x = 12,629,585,424.99
  5. Step 5: Solve for x
    x = 12,629,585,424.99/128,048.18
  6. Step 6: Final answer
    x = 98,631.51

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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.