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Finding the Fourth Proportional to 72,586.02, 108,885.90 and 28,216.20

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Solution

The fourth proportional to 72,586.02, 108,885.90 and 28,216.20 is: 42,326.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,586.02 : 108,885.90 = 28,216.20 : x
  2. Step 2: Convert to fraction form
    72,586.02/108,885.90 = 28,216.20/x
  3. Step 3: Cross multiply
    72,586.02x = 108,885.90 × 28,216.20
  4. Step 4: Simplify right side
    72,586.02x = 3,072,346,331.58
  5. Step 5: Solve for x
    x = 3,072,346,331.58/72,586.02
  6. Step 6: Final answer
    x = 42,326.97

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1.5x scale

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.