Home / 80,976.86-121,465.29-28,386.32

Finding the Fourth Proportional to 80,976.86, 121,465.29 and 28,386.32

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Solution

The fourth proportional to 80,976.86, 121,465.29 and 28,386.32 is: 42,579.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,976.86 : 121,465.29 = 28,386.32 : x
  2. Step 2: Convert to fraction form
    80,976.86/121,465.29 = 28,386.32/x
  3. Step 3: Cross multiply
    80,976.86x = 121,465.29 × 28,386.32
  4. Step 4: Simplify right side
    80,976.86x = 3,447,952,590.83
  5. Step 5: Solve for x
    x = 3,447,952,590.83/80,976.86
  6. Step 6: Final answer
    x = 42,579.48

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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.