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Finding the Fourth Proportional to 115,199.72, 158,976.32 and 64,215.68

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Solution

The fourth proportional to 115,199.72, 158,976.32 and 64,215.68 is: 88,618.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,199.72 : 158,976.32 = 64,215.68 : x
  2. Step 2: Convert to fraction form
    115,199.72/158,976.32 = 64,215.68/x
  3. Step 3: Cross multiply
    115,199.72x = 158,976.32 × 64,215.68
  4. Step 4: Simplify right side
    115,199.72x = 10,208,772,569.06
  5. Step 5: Solve for x
    x = 10,208,772,569.06/115,199.72
  6. Step 6: Final answer
    x = 88,618.04

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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.