Home / 128,839.04-177,633.28-83,436.80

Finding the Fourth Proportional to 128,839.04, 177,633.28 and 83,436.80

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Solution

The fourth proportional to 128,839.04, 177,633.28 and 83,436.80 is: 115,036.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,839.04 : 177,633.28 = 83,436.80 : x
  2. Step 2: Convert to fraction form
    128,839.04/177,633.28 = 83,436.80/x
  3. Step 3: Cross multiply
    128,839.04x = 177,633.28 × 83,436.80
  4. Step 4: Simplify right side
    128,839.04x = 14,821,152,456.70
  5. Step 5: Solve for x
    x = 14,821,152,456.70/128,839.04
  6. Step 6: Final answer
    x = 115,036.19

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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.