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Finding the Fourth Proportional to 75,086.40, 103,630.92 and 42,821.08

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Solution

The fourth proportional to 75,086.40, 103,630.92 and 42,821.08 is: 59,099.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,086.40 : 103,630.92 = 42,821.08 : x
  2. Step 2: Convert to fraction form
    75,086.40/103,630.92 = 42,821.08/x
  3. Step 3: Cross multiply
    75,086.40x = 103,630.92 × 42,821.08
  4. Step 4: Simplify right side
    75,086.40x = 4,437,587,915.79
  5. Step 5: Solve for x
    x = 4,437,587,915.79/75,086.40
  6. Step 6: Final answer
    x = 59,099.76

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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.