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Finding the Fourth Proportional to 305,699.30, 458,569.20 and 81,056.60

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Solution

The fourth proportional to 305,699.30, 458,569.20 and 81,056.60 is: 121,590.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,699.30 : 458,569.20 = 81,056.60 : x
  2. Step 2: Convert to fraction form
    305,699.30/458,569.20 = 81,056.60/x
  3. Step 3: Cross multiply
    305,699.30x = 458,569.20 × 81,056.60
  4. Step 4: Simplify right side
    305,699.30x = 37,170,060,216.72
  5. Step 5: Solve for x
    x = 37,170,060,216.72/305,699.30
  6. Step 6: Final answer
    x = 121,590.27

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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.