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Finding the Fourth Proportional to 86,665.40, 130,041.30 and 49,254.20

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Solution

The fourth proportional to 86,665.40, 130,041.30 and 49,254.20 is: 73,905.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,665.40 : 130,041.30 = 49,254.20 : x
  2. Step 2: Convert to fraction form
    86,665.40/130,041.30 = 49,254.20/x
  3. Step 3: Cross multiply
    86,665.40x = 130,041.30 × 49,254.20
  4. Step 4: Simplify right side
    86,665.40x = 6,405,080,198.46
  5. Step 5: Solve for x
    x = 6,405,080,198.46/86,665.40
  6. Step 6: Final answer
    x = 73,905.85

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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.