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Finding the Fourth Proportional to 128,042.77, 191,969.04 and 61,419.46

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Solution

The fourth proportional to 128,042.77, 191,969.04 and 61,419.46 is: 92,083.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,042.77 : 191,969.04 = 61,419.46 : x
  2. Step 2: Convert to fraction form
    128,042.77/191,969.04 = 61,419.46/x
  3. Step 3: Cross multiply
    128,042.77x = 191,969.04 × 61,419.46
  4. Step 4: Simplify right side
    128,042.77x = 11,790,634,773.52
  5. Step 5: Solve for x
    x = 11,790,634,773.52/128,042.77
  6. Step 6: Final answer
    x = 92,083.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.