Home / 81,639.90-112,666.14-49,384.89

Finding the Fourth Proportional to 81,639.90, 112,666.14 and 49,384.89

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Solution

The fourth proportional to 81,639.90, 112,666.14 and 49,384.89 is: 68,153.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,639.90 : 112,666.14 = 49,384.89 : x
  2. Step 2: Convert to fraction form
    81,639.90/112,666.14 = 49,384.89/x
  3. Step 3: Cross multiply
    81,639.90x = 112,666.14 × 49,384.89
  4. Step 4: Simplify right side
    81,639.90x = 5,564,004,930.62
  5. Step 5: Solve for x
    x = 5,564,004,930.62/81,639.90
  6. Step 6: Final answer
    x = 68,153.01

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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.