Home / 205,031.25-307,683.56-78,775.74

Finding the Fourth Proportional to 205,031.25, 307,683.56 and 78,775.74

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Solution

The fourth proportional to 205,031.25, 307,683.56 and 78,775.74 is: 118,216.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,031.25 : 307,683.56 = 78,775.74 : x
  2. Step 2: Convert to fraction form
    205,031.25/307,683.56 = 78,775.74/x
  3. Step 3: Cross multiply
    205,031.25x = 307,683.56 × 78,775.74
  4. Step 4: Simplify right side
    205,031.25x = 24,238,000,321.77
  5. Step 5: Solve for x
    x = 24,238,000,321.77/205,031.25
  6. Step 6: Final answer
    x = 118,216.13

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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.