Home / 128,401.79-177,199.31-70,262.43

Finding the Fourth Proportional to 128,401.79, 177,199.31 and 70,262.43

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Solution

The fourth proportional to 128,401.79, 177,199.31 and 70,262.43 is: 96,964.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,401.79 : 177,199.31 = 70,262.43 : x
  2. Step 2: Convert to fraction form
    128,401.79/177,199.31 = 70,262.43/x
  3. Step 3: Cross multiply
    128,401.79x = 177,199.31 × 70,262.43
  4. Step 4: Simplify right side
    128,401.79x = 12,450,454,114.92
  5. Step 5: Solve for x
    x = 12,450,454,114.92/128,401.79
  6. Step 6: Final answer
    x = 96,964.81

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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.