Home / 116,621.50-160,987.32-78,403.21

Finding the Fourth Proportional to 116,621.50, 160,987.32 and 78,403.21

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Solution

The fourth proportional to 116,621.50, 160,987.32 and 78,403.21 is: 108,229.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    116,621.50 : 160,987.32 = 78,403.21 : x
  2. Step 2: Convert to fraction form
    116,621.50/160,987.32 = 78,403.21/x
  3. Step 3: Cross multiply
    116,621.50x = 160,987.32 × 78,403.21
  4. Step 4: Simplify right side
    116,621.50x = 12,621,922,657.30
  5. Step 5: Solve for x
    x = 12,621,922,657.30/116,621.50
  6. Step 6: Final answer
    x = 108,229.81

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1.5x scale

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.