Home / 71,981.07-99,333.21-39,715.98

Finding the Fourth Proportional to 71,981.07, 99,333.21 and 39,715.98

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Solution

The fourth proportional to 71,981.07, 99,333.21 and 39,715.98 is: 54,807.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,981.07 : 99,333.21 = 39,715.98 : x
  2. Step 2: Convert to fraction form
    71,981.07/99,333.21 = 39,715.98/x
  3. Step 3: Cross multiply
    71,981.07x = 99,333.21 × 39,715.98
  4. Step 4: Simplify right side
    71,981.07x = 3,945,115,781.70
  5. Step 5: Solve for x
    x = 3,945,115,781.70/71,981.07
  6. Step 6: Final answer
    x = 54,807.69

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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.