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Finding the Fourth Proportional to 71,378.84, 98,458.23 and 45,918.44

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Solution

The fourth proportional to 71,378.84, 98,458.23 and 45,918.44 is: 63,338.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,378.84 : 98,458.23 = 45,918.44 : x
  2. Step 2: Convert to fraction form
    71,378.84/98,458.23 = 45,918.44/x
  3. Step 3: Cross multiply
    71,378.84x = 98,458.23 × 45,918.44
  4. Step 4: Simplify right side
    71,378.84x = 4,521,048,326.76
  5. Step 5: Solve for x
    x = 4,521,048,326.76/71,378.84
  6. Step 6: Final answer
    x = 63,338.78

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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.