Home / 78,114.38-117,147.26-28,187.93

Finding the Fourth Proportional to 78,114.38, 117,147.26 and 28,187.93

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Solution

The fourth proportional to 78,114.38, 117,147.26 and 28,187.93 is: 42,273.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,114.38 : 117,147.26 = 28,187.93 : x
  2. Step 2: Convert to fraction form
    78,114.38/117,147.26 = 28,187.93/x
  3. Step 3: Cross multiply
    78,114.38x = 117,147.26 × 28,187.93
  4. Step 4: Simplify right side
    78,114.38x = 3,302,139,127.91
  5. Step 5: Solve for x
    x = 3,302,139,127.91/78,114.38
  6. Step 6: Final answer
    x = 42,273.13

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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.