Home / 78,094.26-117,140.36-18,930.47

Finding the Fourth Proportional to 78,094.26, 117,140.36 and 18,930.47

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Solution

The fourth proportional to 78,094.26, 117,140.36 and 18,930.47 is: 28,395.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,094.26 : 117,140.36 = 18,930.47 : x
  2. Step 2: Convert to fraction form
    78,094.26/117,140.36 = 18,930.47/x
  3. Step 3: Cross multiply
    78,094.26x = 117,140.36 × 18,930.47
  4. Step 4: Simplify right side
    78,094.26x = 2,217,521,390.42
  5. Step 5: Solve for x
    x = 2,217,521,390.42/78,094.26
  6. Step 6: Final answer
    x = 28,395.45

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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.