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Finding the Fourth Proportional to 71,605.34, 98,816.94 and 39,340.38

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Solution

The fourth proportional to 71,605.34, 98,816.94 and 39,340.38 is: 54,290.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,605.34 : 98,816.94 = 39,340.38 : x
  2. Step 2: Convert to fraction form
    71,605.34/98,816.94 = 39,340.38/x
  3. Step 3: Cross multiply
    71,605.34x = 98,816.94 × 39,340.38
  4. Step 4: Simplify right side
    71,605.34x = 3,887,495,970.04
  5. Step 5: Solve for x
    x = 3,887,495,970.04/71,605.34
  6. Step 6: Final answer
    x = 54,290.59

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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.