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Finding the Fourth Proportional to 70,487.30, 105,772.23 and 28,360.82

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Solution

The fourth proportional to 70,487.30, 105,772.23 and 28,360.82 is: 42,557.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,487.30 : 105,772.23 = 28,360.82 : x
  2. Step 2: Convert to fraction form
    70,487.30/105,772.23 = 28,360.82/x
  3. Step 3: Cross multiply
    70,487.30x = 105,772.23 × 28,360.82
  4. Step 4: Simplify right side
    70,487.30x = 2,999,787,176.03
  5. Step 5: Solve for x
    x = 2,999,787,176.03/70,487.30
  6. Step 6: Final answer
    x = 42,557.84

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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.