Home / 87,643.70-131,465.55-72,869.30

Finding the Fourth Proportional to 87,643.70, 131,465.55 and 72,869.30

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Solution

The fourth proportional to 87,643.70, 131,465.55 and 72,869.30 is: 109,303.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,643.70 : 131,465.55 = 72,869.30 : x
  2. Step 2: Convert to fraction form
    87,643.70/131,465.55 = 72,869.30/x
  3. Step 3: Cross multiply
    87,643.70x = 131,465.55 × 72,869.30
  4. Step 4: Simplify right side
    87,643.70x = 9,579,802,602.62
  5. Step 5: Solve for x
    x = 9,579,802,602.62/87,643.70
  6. Step 6: Final answer
    x = 109,303.95

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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.