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Finding the Fourth Proportional to 86,657.20, 130,004.70 and 49,235.20

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Solution

The fourth proportional to 86,657.20, 130,004.70 and 49,235.20 is: 73,863.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,657.20 : 130,004.70 = 49,235.20 : x
  2. Step 2: Convert to fraction form
    86,657.20/130,004.70 = 49,235.20/x
  3. Step 3: Cross multiply
    86,657.20x = 130,004.70 × 49,235.20
  4. Step 4: Simplify right side
    86,657.20x = 6,400,807,405.44
  5. Step 5: Solve for x
    x = 6,400,807,405.44/86,657.20
  6. Step 6: Final answer
    x = 73,863.54

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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.