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Finding the Fourth Proportional to 68,890.80, 103,336.20 and 65,610.30

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Solution

The fourth proportional to 68,890.80, 103,336.20 and 65,610.30 is: 98,415.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,890.80 : 103,336.20 = 65,610.30 : x
  2. Step 2: Convert to fraction form
    68,890.80/103,336.20 = 65,610.30/x
  3. Step 3: Cross multiply
    68,890.80x = 103,336.20 × 65,610.30
  4. Step 4: Simplify right side
    68,890.80x = 6,779,919,082.86
  5. Step 5: Solve for x
    x = 6,779,919,082.86/68,890.80
  6. Step 6: Final answer
    x = 98,415.45

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1.5x scale

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.