Home / 79,980.08-109,572.20-76,989.52

Finding the Fourth Proportional to 79,980.08, 109,572.20 and 76,989.52

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Solution

The fourth proportional to 79,980.08, 109,572.20 and 76,989.52 is: 105,475.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,980.08 : 109,572.20 = 76,989.52 : x
  2. Step 2: Convert to fraction form
    79,980.08/109,572.20 = 76,989.52/x
  3. Step 3: Cross multiply
    79,980.08x = 109,572.20 × 76,989.52
  4. Step 4: Simplify right side
    79,980.08x = 8,435,911,083.34
  5. Step 5: Solve for x
    x = 8,435,911,083.34/79,980.08
  6. Step 6: Final answer
    x = 105,475.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.