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Finding the Fourth Proportional to 134,435.52, 185,500.80 and 80,712

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Solution

The fourth proportional to 134,435.52, 185,500.80 and 80,712 is: 111,370.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,435.52 : 185,500.80 = 80,712 : x
  2. Step 2: Convert to fraction form
    134,435.52/185,500.80 = 80,712/x
  3. Step 3: Cross multiply
    134,435.52x = 185,500.80 × 80,712
  4. Step 4: Simplify right side
    134,435.52x = 14,972,140,569.60
  5. Step 5: Solve for x
    x = 14,972,140,569.60/134,435.52
  6. Step 6: Final answer
    x = 111,370.42

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.