Home / 78,031.74-117,044.88-21,871.41

Finding the Fourth Proportional to 78,031.74, 117,044.88 and 21,871.41

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Solution

The fourth proportional to 78,031.74, 117,044.88 and 21,871.41 is: 32,806.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,031.74 : 117,044.88 = 21,871.41 : x
  2. Step 2: Convert to fraction form
    78,031.74/117,044.88 = 21,871.41/x
  3. Step 3: Cross multiply
    78,031.74x = 117,044.88 × 21,871.41
  4. Step 4: Simplify right side
    78,031.74x = 2,559,936,558.88
  5. Step 5: Solve for x
    x = 2,559,936,558.88/78,031.74
  6. Step 6: Final answer
    x = 32,806.35

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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.