Home / 131,270.52-196,905.78-72,480

Finding the Fourth Proportional to 131,270.52, 196,905.78 and 72,480

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Solution

The fourth proportional to 131,270.52, 196,905.78 and 72,480 is: 108,720

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,270.52 : 196,905.78 = 72,480 : x
  2. Step 2: Convert to fraction form
    131,270.52/196,905.78 = 72,480/x
  3. Step 3: Cross multiply
    131,270.52x = 196,905.78 × 72,480
  4. Step 4: Simplify right side
    131,270.52x = 14,271,730,934.40
  5. Step 5: Solve for x
    x = 14,271,730,934.40/131,270.52
  6. Step 6: Final answer
    x = 108,720

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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.