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Finding the Fourth Proportional to 99,219.52, 136,923.08 and 53,897.51

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Solution

The fourth proportional to 99,219.52, 136,923.08 and 53,897.51 is: 74,378.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,219.52 : 136,923.08 = 53,897.51 : x
  2. Step 2: Convert to fraction form
    99,219.52/136,923.08 = 53,897.51/x
  3. Step 3: Cross multiply
    99,219.52x = 136,923.08 × 53,897.51
  4. Step 4: Simplify right side
    99,219.52x = 7,379,813,073.53
  5. Step 5: Solve for x
    x = 7,379,813,073.53/99,219.52
  6. Step 6: Final answer
    x = 74,378.64

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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.