Home / 315,091.40-472,694.70-128,121.80

Finding the Fourth Proportional to 315,091.40, 472,694.70 and 128,121.80

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Solution

The fourth proportional to 315,091.40, 472,694.70 and 128,121.80 is: 192,206.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,091.40 : 472,694.70 = 128,121.80 : x
  2. Step 2: Convert to fraction form
    315,091.40/472,694.70 = 128,121.80/x
  3. Step 3: Cross multiply
    315,091.40x = 472,694.70 × 128,121.80
  4. Step 4: Simplify right side
    315,091.40x = 60,562,495,814.46
  5. Step 5: Solve for x
    x = 60,562,495,814.46/315,091.40
  6. Step 6: Final answer
    x = 192,206.12

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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.