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Finding the Fourth Proportional to 109,355.20, 163,903.20 and 56,737.60

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Solution

The fourth proportional to 109,355.20, 163,903.20 and 56,737.60 is: 85,039.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,355.20 : 163,903.20 = 56,737.60 : x
  2. Step 2: Convert to fraction form
    109,355.20/163,903.20 = 56,737.60/x
  3. Step 3: Cross multiply
    109,355.20x = 163,903.20 × 56,737.60
  4. Step 4: Simplify right side
    109,355.20x = 9,299,474,200.32
  5. Step 5: Solve for x
    x = 9,299,474,200.32/109,355.20
  6. Step 6: Final answer
    x = 85,039.16

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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.