Home / 78,586.48-117,878.57-19,422.15

Finding the Fourth Proportional to 78,586.48, 117,878.57 and 19,422.15

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Solution

The fourth proportional to 78,586.48, 117,878.57 and 19,422.15 is: 29,132.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,586.48 : 117,878.57 = 19,422.15 : x
  2. Step 2: Convert to fraction form
    78,586.48/117,878.57 = 19,422.15/x
  3. Step 3: Cross multiply
    78,586.48x = 117,878.57 × 19,422.15
  4. Step 4: Simplify right side
    78,586.48x = 2,289,455,465.91
  5. Step 5: Solve for x
    x = 2,289,455,465.91/78,586.48
  6. Step 6: Final answer
    x = 29,132.94

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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.