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Finding the Fourth Proportional to 86,803.37, 130,215.47 and 30,631.88

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Solution

The fourth proportional to 86,803.37, 130,215.47 and 30,631.88 is: 45,951.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,803.37 : 130,215.47 = 30,631.88 : x
  2. Step 2: Convert to fraction form
    86,803.37/130,215.47 = 30,631.88/x
  3. Step 3: Cross multiply
    86,803.37x = 130,215.47 × 30,631.88
  4. Step 4: Simplify right side
    86,803.37x = 3,988,743,846.95
  5. Step 5: Solve for x
    x = 3,988,743,846.95/86,803.37
  6. Step 6: Final answer
    x = 45,951.49

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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.