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Finding the Fourth Proportional to 86,990.36, 130,493.43 and 34,387.34

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Solution

The fourth proportional to 86,990.36, 130,493.43 and 34,387.34 is: 51,584.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,990.36 : 130,493.43 = 34,387.34 : x
  2. Step 2: Convert to fraction form
    86,990.36/130,493.43 = 34,387.34/x
  3. Step 3: Cross multiply
    86,990.36x = 130,493.43 × 34,387.34
  4. Step 4: Simplify right side
    86,990.36x = 4,487,321,292.71
  5. Step 5: Solve for x
    x = 4,487,321,292.71/86,990.36
  6. Step 6: Final answer
    x = 51,584.12

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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.