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Finding the Fourth Proportional to 109,040.60, 163,479.90 and 56,487.80

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Solution

The fourth proportional to 109,040.60, 163,479.90 and 56,487.80 is: 84,689.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,040.60 : 163,479.90 = 56,487.80 : x
  2. Step 2: Convert to fraction form
    109,040.60/163,479.90 = 56,487.80/x
  3. Step 3: Cross multiply
    109,040.60x = 163,479.90 × 56,487.80
  4. Step 4: Simplify right side
    109,040.60x = 9,234,619,895.22
  5. Step 5: Solve for x
    x = 9,234,619,895.22/109,040.60
  6. Step 6: Final answer
    x = 84,689.74

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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.