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Finding the Fourth Proportional to 108,710.60, 163,065.90 and 73,281.20

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Solution

The fourth proportional to 108,710.60, 163,065.90 and 73,281.20 is: 109,921.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,710.60 : 163,065.90 = 73,281.20 : x
  2. Step 2: Convert to fraction form
    108,710.60/163,065.90 = 73,281.20/x
  3. Step 3: Cross multiply
    108,710.60x = 163,065.90 × 73,281.20
  4. Step 4: Simplify right side
    108,710.60x = 11,949,664,831.08
  5. Step 5: Solve for x
    x = 11,949,664,831.08/108,710.60
  6. Step 6: Final answer
    x = 109,921.80

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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.