Home / 78,094.51-117,140.73-18,930.72

Finding the Fourth Proportional to 78,094.51, 117,140.73 and 18,930.72

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Solution

The fourth proportional to 78,094.51, 117,140.73 and 18,930.72 is: 28,395.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,094.51 : 117,140.73 = 18,930.72 : x
  2. Step 2: Convert to fraction form
    78,094.51/117,140.73 = 18,930.72/x
  3. Step 3: Cross multiply
    78,094.51x = 117,140.73 × 18,930.72
  4. Step 4: Simplify right side
    78,094.51x = 2,217,558,360.23
  5. Step 5: Solve for x
    x = 2,217,558,360.23/78,094.51
  6. Step 6: Final answer
    x = 28,395.83

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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.