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Finding the Fourth Proportional to 67,859.19, 101,777.45 and 21,108.42

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Solution

The fourth proportional to 67,859.19, 101,777.45 and 21,108.42 is: 31,659.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,859.19 : 101,777.45 = 21,108.42 : x
  2. Step 2: Convert to fraction form
    67,859.19/101,777.45 = 21,108.42/x
  3. Step 3: Cross multiply
    67,859.19x = 101,777.45 × 21,108.42
  4. Step 4: Simplify right side
    67,859.19x = 2,148,361,055.59
  5. Step 5: Solve for x
    x = 2,148,361,055.59/67,859.19
  6. Step 6: Final answer
    x = 31,659.10

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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.