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Finding the Fourth Proportional to 126,095.40, 189,021.60 and 72,732.60

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Solution

The fourth proportional to 126,095.40, 189,021.60 and 72,732.60 is: 109,028.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,095.40 : 189,021.60 = 72,732.60 : x
  2. Step 2: Convert to fraction form
    126,095.40/189,021.60 = 72,732.60/x
  3. Step 3: Cross multiply
    126,095.40x = 189,021.60 × 72,732.60
  4. Step 4: Simplify right side
    126,095.40x = 13,748,032,424.16
  5. Step 5: Solve for x
    x = 13,748,032,424.16/126,095.40
  6. Step 6: Final answer
    x = 109,028.82

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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.