Home / 128,401.50-177,194.67-71,812.89

Finding the Fourth Proportional to 128,401.50, 177,194.67 and 71,812.89

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Solution

The fourth proportional to 128,401.50, 177,194.67 and 71,812.89 is: 99,102.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,401.50 : 177,194.67 = 71,812.89 : x
  2. Step 2: Convert to fraction form
    128,401.50/177,194.67 = 71,812.89/x
  3. Step 3: Cross multiply
    128,401.50x = 177,194.67 × 71,812.89
  4. Step 4: Simplify right side
    128,401.50x = 12,724,861,345.30
  5. Step 5: Solve for x
    x = 12,724,861,345.30/128,401.50
  6. Step 6: Final answer
    x = 99,102.12

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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.