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Finding the Fourth Proportional to 86,809.34, 130,079.38 and 60,207.22

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Solution

The fourth proportional to 86,809.34, 130,079.38 and 60,207.22 is: 90,217.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,809.34 : 130,079.38 = 60,207.22 : x
  2. Step 2: Convert to fraction form
    86,809.34/130,079.38 = 60,207.22/x
  3. Step 3: Cross multiply
    86,809.34x = 130,079.38 × 60,207.22
  4. Step 4: Simplify right side
    86,809.34x = 7,831,717,849.12
  5. Step 5: Solve for x
    x = 7,831,717,849.12/86,809.34
  6. Step 6: Final answer
    x = 90,217.46

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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.