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Finding the Fourth Proportional to 111,631, 154,051.86 and 61,331.08

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Solution

The fourth proportional to 111,631, 154,051.86 and 61,331.08 is: 84,637.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,631 : 154,051.86 = 61,331.08 : x
  2. Step 2: Convert to fraction form
    111,631/154,051.86 = 61,331.08/x
  3. Step 3: Cross multiply
    111,631x = 154,051.86 × 61,331.08
  4. Step 4: Simplify right side
    111,631x = 9,448,166,949.81
  5. Step 5: Solve for x
    x = 9,448,166,949.81/111,631
  6. Step 6: Final answer
    x = 84,637.48

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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.