Home / 81,983.61-122,988.36-28,690.47

Finding the Fourth Proportional to 81,983.61, 122,988.36 and 28,690.47

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Solution

The fourth proportional to 81,983.61, 122,988.36 and 28,690.47 is: 43,040.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,983.61 : 122,988.36 = 28,690.47 : x
  2. Step 2: Convert to fraction form
    81,983.61/122,988.36 = 28,690.47/x
  3. Step 3: Cross multiply
    81,983.61x = 122,988.36 × 28,690.47
  4. Step 4: Simplify right side
    81,983.61x = 3,528,593,852.93
  5. Step 5: Solve for x
    x = 3,528,593,852.93/81,983.61
  6. Step 6: Final answer
    x = 43,040.24

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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.