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Finding the Fourth Proportional to 134,898.84, 186,310.80 and 105,043.32

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Solution

The fourth proportional to 134,898.84, 186,310.80 and 105,043.32 is: 145,076.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,898.84 : 186,310.80 = 105,043.32 : x
  2. Step 2: Convert to fraction form
    134,898.84/186,310.80 = 105,043.32/x
  3. Step 3: Cross multiply
    134,898.84x = 186,310.80 × 105,043.32
  4. Step 4: Simplify right side
    134,898.84x = 19,570,704,983.86
  5. Step 5: Solve for x
    x = 19,570,704,983.86/134,898.84
  6. Step 6: Final answer
    x = 145,076.90

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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.