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Finding the Fourth Proportional to 158,536.87, 218,775.08 and 86,915.32

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Solution

The fourth proportional to 158,536.87, 218,775.08 and 86,915.32 is: 119,939.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,536.87 : 218,775.08 = 86,915.32 : x
  2. Step 2: Convert to fraction form
    158,536.87/218,775.08 = 86,915.32/x
  3. Step 3: Cross multiply
    158,536.87x = 218,775.08 × 86,915.32
  4. Step 4: Simplify right side
    158,536.87x = 19,014,905,651.65
  5. Step 5: Solve for x
    x = 19,014,905,651.65/158,536.87
  6. Step 6: Final answer
    x = 119,939.96

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.