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Finding the Fourth Proportional to 93,620.20, 140,430.30 and 81,956.20

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Solution

The fourth proportional to 93,620.20, 140,430.30 and 81,956.20 is: 122,934.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,620.20 : 140,430.30 = 81,956.20 : x
  2. Step 2: Convert to fraction form
    93,620.20/140,430.30 = 81,956.20/x
  3. Step 3: Cross multiply
    93,620.20x = 140,430.30 × 81,956.20
  4. Step 4: Simplify right side
    93,620.20x = 11,509,133,752.86
  5. Step 5: Solve for x
    x = 11,509,133,752.86/93,620.20
  6. Step 6: Final answer
    x = 122,934.30

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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.