Home / 78,415.71-117,586.53-28,460.85

Finding the Fourth Proportional to 78,415.71, 117,586.53 and 28,460.85

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Solution

The fourth proportional to 78,415.71, 117,586.53 and 28,460.85 is: 42,677.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,415.71 : 117,586.53 = 28,460.85 : x
  2. Step 2: Convert to fraction form
    78,415.71/117,586.53 = 28,460.85/x
  3. Step 3: Cross multiply
    78,415.71x = 117,586.53 × 28,460.85
  4. Step 4: Simplify right side
    78,415.71x = 3,346,612,592.35
  5. Step 5: Solve for x
    x = 3,346,612,592.35/78,415.71
  6. Step 6: Final answer
    x = 42,677.83

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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.