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Finding the Fourth Proportional to 158,578.02, 218,840.67 and 86,953.77

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Solution

The fourth proportional to 158,578.02, 218,840.67 and 86,953.77 is: 119,997.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,578.02 : 218,840.67 = 86,953.77 : x
  2. Step 2: Convert to fraction form
    158,578.02/218,840.67 = 86,953.77/x
  3. Step 3: Cross multiply
    158,578.02x = 218,840.67 × 86,953.77
  4. Step 4: Simplify right side
    158,578.02x = 19,029,021,285.83
  5. Step 5: Solve for x
    x = 19,029,021,285.83/158,578.02
  6. Step 6: Final answer
    x = 119,997.85

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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.