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Finding the Fourth Proportional to 91,602.69, 126,405.12 and 51,309.64

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Solution

The fourth proportional to 91,602.69, 126,405.12 and 51,309.64 is: 70,803.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,602.69 : 126,405.12 = 51,309.64 : x
  2. Step 2: Convert to fraction form
    91,602.69/126,405.12 = 51,309.64/x
  3. Step 3: Cross multiply
    91,602.69x = 126,405.12 × 51,309.64
  4. Step 4: Simplify right side
    91,602.69x = 6,485,801,201.36
  5. Step 5: Solve for x
    x = 6,485,801,201.36/91,602.69
  6. Step 6: Final answer
    x = 70,803.61

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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.