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Finding the Fourth Proportional to 102,551.88, 141,585.66 and 78,632.58

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Solution

The fourth proportional to 102,551.88, 141,585.66 and 78,632.58 is: 108,562.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,551.88 : 141,585.66 = 78,632.58 : x
  2. Step 2: Convert to fraction form
    102,551.88/141,585.66 = 78,632.58/x
  3. Step 3: Cross multiply
    102,551.88x = 141,585.66 × 78,632.58
  4. Step 4: Simplify right side
    102,551.88x = 11,133,245,736.80
  5. Step 5: Solve for x
    x = 11,133,245,736.80/102,551.88
  6. Step 6: Final answer
    x = 108,562.08

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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.