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Finding the Fourth Proportional to 134,950.50, 186,248.09 and 78,361.88

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Solution

The fourth proportional to 134,950.50, 186,248.09 and 78,361.88 is: 108,148.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,950.50 : 186,248.09 = 78,361.88 : x
  2. Step 2: Convert to fraction form
    134,950.50/186,248.09 = 78,361.88/x
  3. Step 3: Cross multiply
    134,950.50x = 186,248.09 × 78,361.88
  4. Step 4: Simplify right side
    134,950.50x = 14,594,749,743.47
  5. Step 5: Solve for x
    x = 14,594,749,743.47/134,950.50
  6. Step 6: Final answer
    x = 108,148.91

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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.