Home / 315,078.40-472,675.20-128,108.80

Finding the Fourth Proportional to 315,078.40, 472,675.20 and 128,108.80

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Solution

The fourth proportional to 315,078.40, 472,675.20 and 128,108.80 is: 192,186.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,078.40 : 472,675.20 = 128,108.80 : x
  2. Step 2: Convert to fraction form
    315,078.40/472,675.20 = 128,108.80/x
  3. Step 3: Cross multiply
    315,078.40x = 472,675.20 × 128,108.80
  4. Step 4: Simplify right side
    315,078.40x = 60,553,852,661.76
  5. Step 5: Solve for x
    x = 60,553,852,661.76/315,078.40
  6. Step 6: Final answer
    x = 192,186.62

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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.