Home / 81,678.57-122,402.93-64,964.42

Finding the Fourth Proportional to 81,678.57, 122,402.93 and 64,964.42

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Solution

The fourth proportional to 81,678.57, 122,402.93 and 64,964.42 is: 97,355.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,678.57 : 122,402.93 = 64,964.42 : x
  2. Step 2: Convert to fraction form
    81,678.57/122,402.93 = 64,964.42/x
  3. Step 3: Cross multiply
    81,678.57x = 122,402.93 × 64,964.42
  4. Step 4: Simplify right side
    81,678.57x = 7,951,834,416.91
  5. Step 5: Solve for x
    x = 7,951,834,416.91/81,678.57
  6. Step 6: Final answer
    x = 97,355.21

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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.