Home / 87,981.84-131,802.60-54,715.20

Finding the Fourth Proportional to 87,981.84, 131,802.60 and 54,715.20

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Solution

The fourth proportional to 87,981.84, 131,802.60 and 54,715.20 is: 81,966.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,981.84 : 131,802.60 = 54,715.20 : x
  2. Step 2: Convert to fraction form
    87,981.84/131,802.60 = 54,715.20/x
  3. Step 3: Cross multiply
    87,981.84x = 131,802.60 × 54,715.20
  4. Step 4: Simplify right side
    87,981.84x = 7,211,605,619.52
  5. Step 5: Solve for x
    x = 7,211,605,619.52/87,981.84
  6. Step 6: Final answer
    x = 81,966.98

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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.