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Finding the Fourth Proportional to 131,300.40, 197,047.80 and 86,912.40

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Solution

The fourth proportional to 131,300.40, 197,047.80 and 86,912.40 is: 130,432.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,300.40 : 197,047.80 = 86,912.40 : x
  2. Step 2: Convert to fraction form
    131,300.40/197,047.80 = 86,912.40/x
  3. Step 3: Cross multiply
    131,300.40x = 197,047.80 × 86,912.40
  4. Step 4: Simplify right side
    131,300.40x = 17,125,897,212.72
  5. Step 5: Solve for x
    x = 17,125,897,212.72/131,300.40
  6. Step 6: Final answer
    x = 130,432.94

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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.