Home / 87,629.60-131,444.40-78,298.40

Finding the Fourth Proportional to 87,629.60, 131,444.40 and 78,298.40

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Solution

The fourth proportional to 87,629.60, 131,444.40 and 78,298.40 is: 117,447.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,629.60 : 131,444.40 = 78,298.40 : x
  2. Step 2: Convert to fraction form
    87,629.60/131,444.40 = 78,298.40/x
  3. Step 3: Cross multiply
    87,629.60x = 131,444.40 × 78,298.40
  4. Step 4: Simplify right side
    87,629.60x = 10,291,886,208.96
  5. Step 5: Solve for x
    x = 10,291,886,208.96/87,629.60
  6. Step 6: Final answer
    x = 117,447.60

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1.5x scale

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.