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Finding the Fourth Proportional to 128,616.33, 177,333.70 and 94,521

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Solution

The fourth proportional to 128,616.33, 177,333.70 and 94,521 is: 130,323.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,616.33 : 177,333.70 = 94,521 : x
  2. Step 2: Convert to fraction form
    128,616.33/177,333.70 = 94,521/x
  3. Step 3: Cross multiply
    128,616.33x = 177,333.70 × 94,521
  4. Step 4: Simplify right side
    128,616.33x = 16,761,758,657.70
  5. Step 5: Solve for x
    x = 16,761,758,657.70/128,616.33
  6. Step 6: Final answer
    x = 130,323.72

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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.