Home / 128,127.50-192,126.73-42,708.12

Finding the Fourth Proportional to 128,127.50, 192,126.73 and 42,708.12

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Solution

The fourth proportional to 128,127.50, 192,126.73 and 42,708.12 is: 64,040.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,127.50 : 192,126.73 = 42,708.12 : x
  2. Step 2: Convert to fraction form
    128,127.50/192,126.73 = 42,708.12/x
  3. Step 3: Cross multiply
    128,127.50x = 192,126.73 × 42,708.12
  4. Step 4: Simplify right side
    128,127.50x = 8,205,371,440.05
  5. Step 5: Solve for x
    x = 8,205,371,440.05/128,127.50
  6. Step 6: Final answer
    x = 64,040.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.