Home / 128,605.59-177,522.26-104,690.75

Finding the Fourth Proportional to 128,605.59, 177,522.26 and 104,690.75

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Solution

The fourth proportional to 128,605.59, 177,522.26 and 104,690.75 is: 144,511.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,605.59 : 177,522.26 = 104,690.75 : x
  2. Step 2: Convert to fraction form
    128,605.59/177,522.26 = 104,690.75/x
  3. Step 3: Cross multiply
    128,605.59x = 177,522.26 × 104,690.75
  4. Step 4: Simplify right side
    128,605.59x = 18,584,937,130.03
  5. Step 5: Solve for x
    x = 18,584,937,130.03/128,605.59
  6. Step 6: Final answer
    x = 144,511.11

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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.