Home / 128,299.48-177,057.06-71,711

Finding the Fourth Proportional to 128,299.48, 177,057.06 and 71,711

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Solution

The fourth proportional to 128,299.48, 177,057.06 and 71,711 is: 98,963.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,299.48 : 177,057.06 = 71,711 : x
  2. Step 2: Convert to fraction form
    128,299.48/177,057.06 = 71,711/x
  3. Step 3: Cross multiply
    128,299.48x = 177,057.06 × 71,711
  4. Step 4: Simplify right side
    128,299.48x = 12,696,938,829.66
  5. Step 5: Solve for x
    x = 12,696,938,829.66/128,299.48
  6. Step 6: Final answer
    x = 98,963.29

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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.