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Finding the Fourth Proportional to 86,731.66, 130,008.87 and 49,212.47

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Solution

The fourth proportional to 86,731.66, 130,008.87 and 49,212.47 is: 73,768.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,731.66 : 130,008.87 = 49,212.47 : x
  2. Step 2: Convert to fraction form
    86,731.66/130,008.87 = 49,212.47/x
  3. Step 3: Cross multiply
    86,731.66x = 130,008.87 × 49,212.47
  4. Step 4: Simplify right side
    86,731.66x = 6,398,057,368.55
  5. Step 5: Solve for x
    x = 6,398,057,368.55/86,731.66
  6. Step 6: Final answer
    x = 73,768.42

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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.