Home / 123,143.02-169,823.99-77,742.11

Finding the Fourth Proportional to 123,143.02, 169,823.99 and 77,742.11

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Solution

The fourth proportional to 123,143.02, 169,823.99 and 77,742.11 is: 107,212.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,143.02 : 169,823.99 = 77,742.11 : x
  2. Step 2: Convert to fraction form
    123,143.02/169,823.99 = 77,742.11/x
  3. Step 3: Cross multiply
    123,143.02x = 169,823.99 × 77,742.11
  4. Step 4: Simplify right side
    123,143.02x = 13,202,475,930.13
  5. Step 5: Solve for x
    x = 13,202,475,930.13/123,143.02
  6. Step 6: Final answer
    x = 107,212.54

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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.