Home / 87,643.60-131,465.40-72,869.20

Finding the Fourth Proportional to 87,643.60, 131,465.40 and 72,869.20

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Solution

The fourth proportional to 87,643.60, 131,465.40 and 72,869.20 is: 109,303.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,643.60 : 131,465.40 = 72,869.20 : x
  2. Step 2: Convert to fraction form
    87,643.60/131,465.40 = 72,869.20/x
  3. Step 3: Cross multiply
    87,643.60x = 131,465.40 × 72,869.20
  4. Step 4: Simplify right side
    87,643.60x = 9,579,778,525.68
  5. Step 5: Solve for x
    x = 9,579,778,525.68/87,643.60
  6. Step 6: Final answer
    x = 109,303.80

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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.