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Finding the Fourth Proportional to 71,322.90, 98,424.45 and 39,491.70

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Solution

The fourth proportional to 71,322.90, 98,424.45 and 39,491.70 is: 54,497.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,322.90 : 98,424.45 = 39,491.70 : x
  2. Step 2: Convert to fraction form
    71,322.90/98,424.45 = 39,491.70/x
  3. Step 3: Cross multiply
    71,322.90x = 98,424.45 × 39,491.70
  4. Step 4: Simplify right side
    71,322.90x = 3,886,948,852.07
  5. Step 5: Solve for x
    x = 3,886,948,852.07/71,322.90
  6. Step 6: Final answer
    x = 54,497.91

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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.