Home / 138,721.64-191,435.32-75,059.48

Finding the Fourth Proportional to 138,721.64, 191,435.32 and 75,059.48

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Solution

The fourth proportional to 138,721.64, 191,435.32 and 75,059.48 is: 103,581.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,721.64 : 191,435.32 = 75,059.48 : x
  2. Step 2: Convert to fraction form
    138,721.64/191,435.32 = 75,059.48/x
  3. Step 3: Cross multiply
    138,721.64x = 191,435.32 × 75,059.48
  4. Step 4: Simplify right side
    138,721.64x = 14,369,035,572.83
  5. Step 5: Solve for x
    x = 14,369,035,572.83/138,721.64
  6. Step 6: Final answer
    x = 103,581.79

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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.