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Finding the Fourth Proportional to 70,438.86, 105,636 and 23,043

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Solution

The fourth proportional to 70,438.86, 105,636 and 23,043 is: 34,557.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,438.86 : 105,636 = 23,043 : x
  2. Step 2: Convert to fraction form
    70,438.86/105,636 = 23,043/x
  3. Step 3: Cross multiply
    70,438.86x = 105,636 × 23,043
  4. Step 4: Simplify right side
    70,438.86x = 2,434,170,348
  5. Step 5: Solve for x
    x = 2,434,170,348/70,438.86
  6. Step 6: Final answer
    x = 34,557.21

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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.