Home / 80,615.04-120,379.32-65,853.12

Finding the Fourth Proportional to 80,615.04, 120,379.32 and 65,853.12

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Solution

The fourth proportional to 80,615.04, 120,379.32 and 65,853.12 is: 98,335.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,615.04 : 120,379.32 = 65,853.12 : x
  2. Step 2: Convert to fraction form
    80,615.04/120,379.32 = 65,853.12/x
  3. Step 3: Cross multiply
    80,615.04x = 120,379.32 × 65,853.12
  4. Step 4: Simplify right side
    80,615.04x = 7,927,353,805.48
  5. Step 5: Solve for x
    x = 7,927,353,805.48/80,615.04
  6. Step 6: Final answer
    x = 98,335.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.