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Finding the Fourth Proportional to 153,957.44, 212,467.20 and 86,888

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Solution

The fourth proportional to 153,957.44, 212,467.20 and 86,888 is: 119,908.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,957.44 : 212,467.20 = 86,888 : x
  2. Step 2: Convert to fraction form
    153,957.44/212,467.20 = 86,888/x
  3. Step 3: Cross multiply
    153,957.44x = 212,467.20 × 86,888
  4. Step 4: Simplify right side
    153,957.44x = 18,460,850,073.60
  5. Step 5: Solve for x
    x = 18,460,850,073.60/153,957.44
  6. Step 6: Final answer
    x = 119,908.79

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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.