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Finding the Fourth Proportional to 128,792.66, 177,735.33 and 71,433.11

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Solution

The fourth proportional to 128,792.66, 177,735.33 and 71,433.11 is: 98,578.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,792.66 : 177,735.33 = 71,433.11 : x
  2. Step 2: Convert to fraction form
    128,792.66/177,735.33 = 71,433.11/x
  3. Step 3: Cross multiply
    128,792.66x = 177,735.33 × 71,433.11
  4. Step 4: Simplify right side
    128,792.66x = 12,696,187,823.11
  5. Step 5: Solve for x
    x = 12,696,187,823.11/128,792.66
  6. Step 6: Final answer
    x = 98,578.51

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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.