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Finding the Fourth Proportional to 111,732.77, 154,191.21 and 61,431.77

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Solution

The fourth proportional to 111,732.77, 154,191.21 and 61,431.77 is: 84,775.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,732.77 : 154,191.21 = 61,431.77 : x
  2. Step 2: Convert to fraction form
    111,732.77/154,191.21 = 61,431.77/x
  3. Step 3: Cross multiply
    111,732.77x = 154,191.21 × 61,431.77
  4. Step 4: Simplify right side
    111,732.77x = 9,472,238,948.74
  5. Step 5: Solve for x
    x = 9,472,238,948.74/111,732.77
  6. Step 6: Final answer
    x = 84,775.84

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1.5x scale

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.