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Finding the Fourth Proportional to 93,216.20, 139,725.84 and 66,906.68

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Solution

The fourth proportional to 93,216.20, 139,725.84 and 66,906.68 is: 100,289.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,216.20 : 139,725.84 = 66,906.68 : x
  2. Step 2: Convert to fraction form
    93,216.20/139,725.84 = 66,906.68/x
  3. Step 3: Cross multiply
    93,216.20x = 139,725.84 × 66,906.68
  4. Step 4: Simplify right side
    93,216.20x = 9,348,592,064.61
  5. Step 5: Solve for x
    x = 9,348,592,064.61/93,216.20
  6. Step 6: Final answer
    x = 100,289.35

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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.