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Finding the Fourth Proportional to 99,172, 136,864.65 and 61,453.54

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Solution

The fourth proportional to 99,172, 136,864.65 and 61,453.54 is: 84,810.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,172 : 136,864.65 = 61,453.54 : x
  2. Step 2: Convert to fraction form
    99,172/136,864.65 = 61,453.54/x
  3. Step 3: Cross multiply
    99,172x = 136,864.65 × 61,453.54
  4. Step 4: Simplify right side
    99,172x = 8,410,817,243.36
  5. Step 5: Solve for x
    x = 8,410,817,243.36/99,172
  6. Step 6: Final answer
    x = 84,810.40

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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.