Home / 83,385.16-125,078.36-21,055.68

Finding the Fourth Proportional to 83,385.16, 125,078.36 and 21,055.68

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Solution

The fourth proportional to 83,385.16, 125,078.36 and 21,055.68 is: 31,583.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,385.16 : 125,078.36 = 21,055.68 : x
  2. Step 2: Convert to fraction form
    83,385.16/125,078.36 = 21,055.68/x
  3. Step 3: Cross multiply
    83,385.16x = 125,078.36 × 21,055.68
  4. Step 4: Simplify right side
    83,385.16x = 2,633,609,923.08
  5. Step 5: Solve for x
    x = 2,633,609,923.08/83,385.16
  6. Step 6: Final answer
    x = 31,583.68

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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.