Home / 205,117.40-307,530.30-78,708.80

Finding the Fourth Proportional to 205,117.40, 307,530.30 and 78,708.80

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Solution

The fourth proportional to 205,117.40, 307,530.30 and 78,708.80 is: 118,007.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,117.40 : 307,530.30 = 78,708.80 : x
  2. Step 2: Convert to fraction form
    205,117.40/307,530.30 = 78,708.80/x
  3. Step 3: Cross multiply
    205,117.40x = 307,530.30 × 78,708.80
  4. Step 4: Simplify right side
    205,117.40x = 24,205,340,876.64
  5. Step 5: Solve for x
    x = 24,205,340,876.64/205,117.40
  6. Step 6: Final answer
    x = 118,007.25

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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.