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Finding the Fourth Proportional to 72,444.70, 108,630.60 and 42,871.60

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Solution

The fourth proportional to 72,444.70, 108,630.60 and 42,871.60 is: 64,285.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,444.70 : 108,630.60 = 42,871.60 : x
  2. Step 2: Convert to fraction form
    72,444.70/108,630.60 = 42,871.60/x
  3. Step 3: Cross multiply
    72,444.70x = 108,630.60 × 42,871.60
  4. Step 4: Simplify right side
    72,444.70x = 4,657,167,630.96
  5. Step 5: Solve for x
    x = 4,657,167,630.96/72,444.70
  6. Step 6: Final answer
    x = 64,285.83

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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.