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Finding the Fourth Proportional to 186,470.60, 279,803.10 and 81,300.20

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Solution

The fourth proportional to 186,470.60, 279,803.10 and 81,300.20 is: 121,992.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,470.60 : 279,803.10 = 81,300.20 : x
  2. Step 2: Convert to fraction form
    186,470.60/279,803.10 = 81,300.20/x
  3. Step 3: Cross multiply
    186,470.60x = 279,803.10 × 81,300.20
  4. Step 4: Simplify right side
    186,470.60x = 22,748,047,990.62
  5. Step 5: Solve for x
    x = 22,748,047,990.62/186,470.60
  6. Step 6: Final answer
    x = 121,992.68

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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.