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Finding the Fourth Proportional to 86,601.40, 129,945.30 and 49,190.20

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Solution

The fourth proportional to 86,601.40, 129,945.30 and 49,190.20 is: 73,809.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,601.40 : 129,945.30 = 49,190.20 : x
  2. Step 2: Convert to fraction form
    86,601.40/129,945.30 = 49,190.20/x
  3. Step 3: Cross multiply
    86,601.40x = 129,945.30 × 49,190.20
  4. Step 4: Simplify right side
    86,601.40x = 6,392,035,296.06
  5. Step 5: Solve for x
    x = 6,392,035,296.06/86,601.40
  6. Step 6: Final answer
    x = 73,809.84

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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.