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Finding the Fourth Proportional to 111,623.84, 154,040.72 and 61,322.88

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Solution

The fourth proportional to 111,623.84, 154,040.72 and 61,322.88 is: 84,625.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,623.84 : 154,040.72 = 61,322.88 : x
  2. Step 2: Convert to fraction form
    111,623.84/154,040.72 = 61,322.88/x
  3. Step 3: Cross multiply
    111,623.84x = 154,040.72 × 61,322.88
  4. Step 4: Simplify right side
    111,623.84x = 9,446,220,587.67
  5. Step 5: Solve for x
    x = 9,446,220,587.67/111,623.84
  6. Step 6: Final answer
    x = 84,625.48

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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.