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Finding the Fourth Proportional to 67,613.58, 101,421.90 and 20,866.50

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Solution

The fourth proportional to 67,613.58, 101,421.90 and 20,866.50 is: 31,300.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,613.58 : 101,421.90 = 20,866.50 : x
  2. Step 2: Convert to fraction form
    67,613.58/101,421.90 = 20,866.50/x
  3. Step 3: Cross multiply
    67,613.58x = 101,421.90 × 20,866.50
  4. Step 4: Simplify right side
    67,613.58x = 2,116,320,076.35
  5. Step 5: Solve for x
    x = 2,116,320,076.35/67,613.58
  6. Step 6: Final answer
    x = 31,300.22

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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.