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Finding the Fourth Proportional to 70,385.28, 105,503.40 and 32,913.87

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Solution

The fourth proportional to 70,385.28, 105,503.40 and 32,913.87 is: 49,335.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,385.28 : 105,503.40 = 32,913.87 : x
  2. Step 2: Convert to fraction form
    70,385.28/105,503.40 = 32,913.87/x
  3. Step 3: Cross multiply
    70,385.28x = 105,503.40 × 32,913.87
  4. Step 4: Simplify right side
    70,385.28x = 3,472,525,192.16
  5. Step 5: Solve for x
    x = 3,472,525,192.16/70,385.28
  6. Step 6: Final answer
    x = 49,335.96

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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.