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Finding the Fourth Proportional to 128,605.62, 177,477.03 and 71,246.64

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Solution

The fourth proportional to 128,605.62, 177,477.03 and 71,246.64 is: 98,321.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,605.62 : 177,477.03 = 71,246.64 : x
  2. Step 2: Convert to fraction form
    128,605.62/177,477.03 = 71,246.64/x
  3. Step 3: Cross multiply
    128,605.62x = 177,477.03 × 71,246.64
  4. Step 4: Simplify right side
    128,605.62x = 12,644,642,064.68
  5. Step 5: Solve for x
    x = 12,644,642,064.68/128,605.62
  6. Step 6: Final answer
    x = 98,321.07

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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.