Home / 111,790.51-154,220.01-66,442.72

Finding the Fourth Proportional to 111,790.51, 154,220.01 and 66,442.72

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Solution

The fourth proportional to 111,790.51, 154,220.01 and 66,442.72 is: 91,660.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,790.51 : 154,220.01 = 66,442.72 : x
  2. Step 2: Convert to fraction form
    111,790.51/154,220.01 = 66,442.72/x
  3. Step 3: Cross multiply
    111,790.51x = 154,220.01 × 66,442.72
  4. Step 4: Simplify right side
    111,790.51x = 10,246,796,557.28
  5. Step 5: Solve for x
    x = 10,246,796,557.28/111,790.51
  6. Step 6: Final answer
    x = 91,660.70

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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.