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Finding the Fourth Proportional to 218,967.80, 302,177.73 and 128,377.40

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Solution

The fourth proportional to 218,967.80, 302,177.73 and 128,377.40 is: 177,162.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,967.80 : 302,177.73 = 128,377.40 : x
  2. Step 2: Convert to fraction form
    218,967.80/302,177.73 = 128,377.40/x
  3. Step 3: Cross multiply
    218,967.80x = 302,177.73 × 128,377.40
  4. Step 4: Simplify right side
    218,967.80x = 38,792,789,804.41
  5. Step 5: Solve for x
    x = 38,792,789,804.41/218,967.80
  6. Step 6: Final answer
    x = 177,162.08

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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.