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Finding the Fourth Proportional to 93,970.80, 140,956.20 and 81,286.20

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Solution

The fourth proportional to 93,970.80, 140,956.20 and 81,286.20 is: 121,929.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,970.80 : 140,956.20 = 81,286.20 : x
  2. Step 2: Convert to fraction form
    93,970.80/140,956.20 = 81,286.20/x
  3. Step 3: Cross multiply
    93,970.80x = 140,956.20 × 81,286.20
  4. Step 4: Simplify right side
    93,970.80x = 11,457,793,864.44
  5. Step 5: Solve for x
    x = 11,457,793,864.44/93,970.80
  6. Step 6: Final answer
    x = 121,929.30

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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.