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Finding the Fourth Proportional to 158,537.87, 218,776.45 and 86,916.32

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Solution

The fourth proportional to 158,537.87, 218,776.45 and 86,916.32 is: 119,941.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,537.87 : 218,776.45 = 86,916.32 : x
  2. Step 2: Convert to fraction form
    158,537.87/218,776.45 = 86,916.32/x
  3. Step 3: Cross multiply
    158,537.87x = 218,776.45 × 86,916.32
  4. Step 4: Simplify right side
    158,537.87x = 19,015,243,936.66
  5. Step 5: Solve for x
    x = 19,015,243,936.66/158,537.87
  6. Step 6: Final answer
    x = 119,941.34

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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.