Home / 122,127.90-168,538.25-71,139.31

Finding the Fourth Proportional to 122,127.90, 168,538.25 and 71,139.31

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Solution

The fourth proportional to 122,127.90, 168,538.25 and 71,139.31 is: 98,173.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,127.90 : 168,538.25 = 71,139.31 : x
  2. Step 2: Convert to fraction form
    122,127.90/168,538.25 = 71,139.31/x
  3. Step 3: Cross multiply
    122,127.90x = 168,538.25 × 71,139.31
  4. Step 4: Simplify right side
    122,127.90x = 11,989,694,457.91
  5. Step 5: Solve for x
    x = 11,989,694,457.91/122,127.90
  6. Step 6: Final answer
    x = 98,173.27

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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.