Home / 77,986.34-107,638.82-65,217.35

Finding the Fourth Proportional to 77,986.34, 107,638.82 and 65,217.35

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Solution

The fourth proportional to 77,986.34, 107,638.82 and 65,217.35 is: 90,014.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,986.34 : 107,638.82 = 65,217.35 : x
  2. Step 2: Convert to fraction form
    77,986.34/107,638.82 = 65,217.35/x
  3. Step 3: Cross multiply
    77,986.34x = 107,638.82 × 65,217.35
  4. Step 4: Simplify right side
    77,986.34x = 7,019,919,151.95
  5. Step 5: Solve for x
    x = 7,019,919,151.95/77,986.34
  6. Step 6: Final answer
    x = 90,014.72

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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.