Home / 81,931.13-122,866.93-28,608.13

Finding the Fourth Proportional to 81,931.13, 122,866.93 and 28,608.13

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Solution

The fourth proportional to 81,931.13, 122,866.93 and 28,608.13 is: 42,901.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,931.13 : 122,866.93 = 28,608.13 : x
  2. Step 2: Convert to fraction form
    81,931.13/122,866.93 = 28,608.13/x
  3. Step 3: Cross multiply
    81,931.13x = 122,866.93 × 28,608.13
  4. Step 4: Simplify right side
    81,931.13x = 3,514,992,348.77
  5. Step 5: Solve for x
    x = 3,514,992,348.77/81,931.13
  6. Step 6: Final answer
    x = 42,901.80

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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.