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Finding the Fourth Proportional to 158,005.52, 218,038.60 and 86,371.28

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Solution

The fourth proportional to 158,005.52, 218,038.60 and 86,371.28 is: 119,187.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,005.52 : 218,038.60 = 86,371.28 : x
  2. Step 2: Convert to fraction form
    158,005.52/218,038.60 = 86,371.28/x
  3. Step 3: Cross multiply
    158,005.52x = 218,038.60 × 86,371.28
  4. Step 4: Simplify right side
    158,005.52x = 18,832,272,971.41
  5. Step 5: Solve for x
    x = 18,832,272,971.41/158,005.52
  6. Step 6: Final answer
    x = 119,187.44

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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.