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Finding the Fourth Proportional to 134,989.92, 186,277.92 and 81,292.32

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Solution

The fourth proportional to 134,989.92, 186,277.92 and 81,292.32 is: 112,178.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,989.92 : 186,277.92 = 81,292.32 : x
  2. Step 2: Convert to fraction form
    134,989.92/186,277.92 = 81,292.32/x
  3. Step 3: Cross multiply
    134,989.92x = 186,277.92 × 81,292.32
  4. Step 4: Simplify right side
    134,989.92x = 15,142,964,281.57
  5. Step 5: Solve for x
    x = 15,142,964,281.57/134,989.92
  6. Step 6: Final answer
    x = 112,178.48

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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.