Home / 96,678.50-145,123.79-76,815.68

Finding the Fourth Proportional to 96,678.50, 145,123.79 and 76,815.68

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Solution

The fourth proportional to 96,678.50, 145,123.79 and 76,815.68 is: 115,307.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    96,678.50 : 145,123.79 = 76,815.68 : x
  2. Step 2: Convert to fraction form
    96,678.50/145,123.79 = 76,815.68/x
  3. Step 3: Cross multiply
    96,678.50x = 145,123.79 × 76,815.68
  4. Step 4: Simplify right side
    96,678.50x = 11,147,781,503.33
  5. Step 5: Solve for x
    x = 11,147,781,503.33/96,678.50
  6. Step 6: Final answer
    x = 115,307.77

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.