Home / 78,083.16-117,172.92-30,689.93

Finding the Fourth Proportional to 78,083.16, 117,172.92 and 30,689.93

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Solution

The fourth proportional to 78,083.16, 117,172.92 and 30,689.93 is: 46,053.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,083.16 : 117,172.92 = 30,689.93 : x
  2. Step 2: Convert to fraction form
    78,083.16/117,172.92 = 30,689.93/x
  3. Step 3: Cross multiply
    78,083.16x = 117,172.92 × 30,689.93
  4. Step 4: Simplify right side
    78,083.16x = 3,596,028,126.83
  5. Step 5: Solve for x
    x = 3,596,028,126.83/78,083.16
  6. Step 6: Final answer
    x = 46,053.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.