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Finding the Fourth Proportional to 126,671.76, 189,979.56 and 56,506.32

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Solution

The fourth proportional to 126,671.76, 189,979.56 and 56,506.32 is: 84,746.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,671.76 : 189,979.56 = 56,506.32 : x
  2. Step 2: Convert to fraction form
    126,671.76/189,979.56 = 56,506.32/x
  3. Step 3: Cross multiply
    126,671.76x = 189,979.56 × 56,506.32
  4. Step 4: Simplify right side
    126,671.76x = 10,735,045,810.82
  5. Step 5: Solve for x
    x = 10,735,045,810.82/126,671.76
  6. Step 6: Final answer
    x = 84,746.95

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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.