Home / 71,139.74-98,172.14-39,308.63

Finding the Fourth Proportional to 71,139.74, 98,172.14 and 39,308.63

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Solution

The fourth proportional to 71,139.74, 98,172.14 and 39,308.63 is: 54,245.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,139.74 : 98,172.14 = 39,308.63 : x
  2. Step 2: Convert to fraction form
    71,139.74/98,172.14 = 39,308.63/x
  3. Step 3: Cross multiply
    71,139.74x = 98,172.14 × 39,308.63
  4. Step 4: Simplify right side
    71,139.74x = 3,859,011,640.16
  5. Step 5: Solve for x
    x = 3,859,011,640.16/71,139.74
  6. Step 6: Final answer
    x = 54,245.52

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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.