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Finding the Fourth Proportional to 126,458.79, 189,683.79 and 31,689.81

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Solution

The fourth proportional to 126,458.79, 189,683.79 and 31,689.81 is: 47,533.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,458.79 : 189,683.79 = 31,689.81 : x
  2. Step 2: Convert to fraction form
    126,458.79/189,683.79 = 31,689.81/x
  3. Step 3: Cross multiply
    126,458.79x = 189,683.79 × 31,689.81
  4. Step 4: Simplify right side
    126,458.79x = 6,011,043,265.18
  5. Step 5: Solve for x
    x = 6,011,043,265.18/126,458.79
  6. Step 6: Final answer
    x = 47,533.61

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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.