Home / 86,988.37-130,318.89-68,211.40

Finding the Fourth Proportional to 86,988.37, 130,318.89 and 68,211.40

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Solution

The fourth proportional to 86,988.37, 130,318.89 and 68,211.40 is: 102,188.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,988.37 : 130,318.89 = 68,211.40 : x
  2. Step 2: Convert to fraction form
    86,988.37/130,318.89 = 68,211.40/x
  3. Step 3: Cross multiply
    86,988.37x = 130,318.89 × 68,211.40
  4. Step 4: Simplify right side
    86,988.37x = 8,889,233,933.35
  5. Step 5: Solve for x
    x = 8,889,233,933.35/86,988.37
  6. Step 6: Final answer
    x = 102,188.76

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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.