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Finding the Fourth Proportional to 91,509.68, 126,289 and 53,270

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Solution

The fourth proportional to 91,509.68, 126,289 and 53,270 is: 73,515.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,509.68 : 126,289 = 53,270 : x
  2. Step 2: Convert to fraction form
    91,509.68/126,289 = 53,270/x
  3. Step 3: Cross multiply
    91,509.68x = 126,289 × 53,270
  4. Step 4: Simplify right side
    91,509.68x = 6,727,415,030
  5. Step 5: Solve for x
    x = 6,727,415,030/91,509.68
  6. Step 6: Final answer
    x = 73,515.88

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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.