Home / 128,763.41-177,690.22-71,401.81

Finding the Fourth Proportional to 128,763.41, 177,690.22 and 71,401.81

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Solution

The fourth proportional to 128,763.41, 177,690.22 and 71,401.81 is: 98,532.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,763.41 : 177,690.22 = 71,401.81 : x
  2. Step 2: Convert to fraction form
    128,763.41/177,690.22 = 71,401.81/x
  3. Step 3: Cross multiply
    128,763.41x = 177,690.22 × 71,401.81
  4. Step 4: Simplify right side
    128,763.41x = 12,687,403,950.03
  5. Step 5: Solve for x
    x = 12,687,403,950.03/128,763.41
  6. Step 6: Final answer
    x = 98,532.68

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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.