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Finding the Fourth Proportional to 126,636.53, 189,955.15 and 51,756.69

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Solution

The fourth proportional to 126,636.53, 189,955.15 and 51,756.69 is: 77,635.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,636.53 : 189,955.15 = 51,756.69 : x
  2. Step 2: Convert to fraction form
    126,636.53/189,955.15 = 51,756.69/x
  3. Step 3: Cross multiply
    126,636.53x = 189,955.15 × 51,756.69
  4. Step 4: Simplify right side
    126,636.53x = 9,831,448,970.73
  5. Step 5: Solve for x
    x = 9,831,448,970.73/126,636.53
  6. Step 6: Final answer
    x = 77,635.17

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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.