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Finding the Fourth Proportional to 111,643.92, 154,068.54 and 61,342.92

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Solution

The fourth proportional to 111,643.92, 154,068.54 and 61,342.92 is: 84,653.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,643.92 : 154,068.54 = 61,342.92 : x
  2. Step 2: Convert to fraction form
    111,643.92/154,068.54 = 61,342.92/x
  3. Step 3: Cross multiply
    111,643.92x = 154,068.54 × 61,342.92
  4. Step 4: Simplify right side
    111,643.92x = 9,451,014,123.74
  5. Step 5: Solve for x
    x = 9,451,014,123.74/111,643.92
  6. Step 6: Final answer
    x = 84,653.19

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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.