Home / 128,436.70-177,412.08-98,590.82

Finding the Fourth Proportional to 128,436.70, 177,412.08 and 98,590.82

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Solution

The fourth proportional to 128,436.70, 177,412.08 and 98,590.82 is: 136,185.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,436.70 : 177,412.08 = 98,590.82 : x
  2. Step 2: Convert to fraction form
    128,436.70/177,412.08 = 98,590.82/x
  3. Step 3: Cross multiply
    128,436.70x = 177,412.08 × 98,590.82
  4. Step 4: Simplify right side
    128,436.70x = 17,491,202,445.11
  5. Step 5: Solve for x
    x = 17,491,202,445.11/128,436.70
  6. Step 6: Final answer
    x = 136,185.39

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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.