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Finding the Fourth Proportional to 186,455.60, 279,780.60 and 81,285.20

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Solution

The fourth proportional to 186,455.60, 279,780.60 and 81,285.20 is: 121,970.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    186,455.60 : 279,780.60 = 81,285.20 : x
  2. Step 2: Convert to fraction form
    186,455.60/279,780.60 = 81,285.20/x
  3. Step 3: Cross multiply
    186,455.60x = 279,780.60 × 81,285.20
  4. Step 4: Simplify right side
    186,455.60x = 22,742,022,027.12
  5. Step 5: Solve for x
    x = 22,742,022,027.12/186,455.60
  6. Step 6: Final answer
    x = 121,970.17

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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.