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Finding the Fourth Proportional to 91,435.71, 126,191.75 and 51,159.68

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Solution

The fourth proportional to 91,435.71, 126,191.75 and 51,159.68 is: 70,606.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,435.71 : 126,191.75 = 51,159.68 : x
  2. Step 2: Convert to fraction form
    91,435.71/126,191.75 = 51,159.68/x
  3. Step 3: Cross multiply
    91,435.71x = 126,191.75 × 51,159.68
  4. Step 4: Simplify right side
    91,435.71x = 6,455,928,661.88
  5. Step 5: Solve for x
    x = 6,455,928,661.88/91,435.71
  6. Step 6: Final answer
    x = 70,606.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.