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Finding the Fourth Proportional to 70,990.46, 106,432.68 and 42,904.11

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Solution

The fourth proportional to 70,990.46, 106,432.68 and 42,904.11 is: 64,324.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,990.46 : 106,432.68 = 42,904.11 : x
  2. Step 2: Convert to fraction form
    70,990.46/106,432.68 = 42,904.11/x
  3. Step 3: Cross multiply
    70,990.46x = 106,432.68 × 42,904.11
  4. Step 4: Simplify right side
    70,990.46x = 4,566,399,970.33
  5. Step 5: Solve for x
    x = 4,566,399,970.33/70,990.46
  6. Step 6: Final answer
    x = 64,324.14

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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.