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Finding the Fourth Proportional to 128,863.04, 177,830.56 and 72,274.24

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Solution

The fourth proportional to 128,863.04, 177,830.56 and 72,274.24 is: 99,738.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,863.04 : 177,830.56 = 72,274.24 : x
  2. Step 2: Convert to fraction form
    128,863.04/177,830.56 = 72,274.24/x
  3. Step 3: Cross multiply
    128,863.04x = 177,830.56 × 72,274.24
  4. Step 4: Simplify right side
    128,863.04x = 12,852,568,572.77
  5. Step 5: Solve for x
    x = 12,852,568,572.77/128,863.04
  6. Step 6: Final answer
    x = 99,738.21

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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.