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Finding the Fourth Proportional to 76,904.76, 106,128.56 and 43,370.76

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Solution

The fourth proportional to 76,904.76, 106,128.56 and 43,370.76 is: 59,851.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,904.76 : 106,128.56 = 43,370.76 : x
  2. Step 2: Convert to fraction form
    76,904.76/106,128.56 = 43,370.76/x
  3. Step 3: Cross multiply
    76,904.76x = 106,128.56 × 43,370.76
  4. Step 4: Simplify right side
    76,904.76x = 4,602,876,304.91
  5. Step 5: Solve for x
    x = 4,602,876,304.91/76,904.76
  6. Step 6: Final answer
    x = 59,851.64

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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.