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Finding the Fourth Proportional to 158,688, 218,989.44 and 88,032

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Solution

The fourth proportional to 158,688, 218,989.44 and 88,032 is: 121,484.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,688 : 218,989.44 = 88,032 : x
  2. Step 2: Convert to fraction form
    158,688/218,989.44 = 88,032/x
  3. Step 3: Cross multiply
    158,688x = 218,989.44 × 88,032
  4. Step 4: Simplify right side
    158,688x = 19,278,078,382.08
  5. Step 5: Solve for x
    x = 19,278,078,382.08/158,688
  6. Step 6: Final answer
    x = 121,484.16

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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.