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Finding the Fourth Proportional to 71,666.48, 98,903.40 and 39,836

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Solution

The fourth proportional to 71,666.48, 98,903.40 and 39,836 is: 54,975.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,666.48 : 98,903.40 = 39,836 : x
  2. Step 2: Convert to fraction form
    71,666.48/98,903.40 = 39,836/x
  3. Step 3: Cross multiply
    71,666.48x = 98,903.40 × 39,836
  4. Step 4: Simplify right side
    71,666.48x = 3,939,915,842.40
  5. Step 5: Solve for x
    x = 3,939,915,842.40/71,666.48
  6. Step 6: Final answer
    x = 54,975.71

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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.