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Finding the Fourth Proportional to 91,720.90, 126,576.22 and 53,479.40

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Solution

The fourth proportional to 91,720.90, 126,576.22 and 53,479.40 is: 73,802.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,720.90 : 126,576.22 = 53,479.40 : x
  2. Step 2: Convert to fraction form
    91,720.90/126,576.22 = 53,479.40/x
  3. Step 3: Cross multiply
    91,720.90x = 126,576.22 × 53,479.40
  4. Step 4: Simplify right side
    91,720.90x = 6,769,220,299.87
  5. Step 5: Solve for x
    x = 6,769,220,299.87/91,720.90
  6. Step 6: Final answer
    x = 73,802.38

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1.5x scale

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.