Home / 77,587.50-116,388-21,427.68

Finding the Fourth Proportional to 77,587.50, 116,388 and 21,427.68

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Solution

The fourth proportional to 77,587.50, 116,388 and 21,427.68 is: 32,143.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,587.50 : 116,388 = 21,427.68 : x
  2. Step 2: Convert to fraction form
    77,587.50/116,388 = 21,427.68/x
  3. Step 3: Cross multiply
    77,587.50x = 116,388 × 21,427.68
  4. Step 4: Simplify right side
    77,587.50x = 2,493,924,819.84
  5. Step 5: Solve for x
    x = 2,493,924,819.84/77,587.50
  6. Step 6: Final answer
    x = 32,143.38

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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.