Home / 78,178.52-117,256.44-25,590.08

Finding the Fourth Proportional to 78,178.52, 117,256.44 and 25,590.08

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Solution

The fourth proportional to 78,178.52, 117,256.44 and 25,590.08 is: 38,381.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,178.52 : 117,256.44 = 25,590.08 : x
  2. Step 2: Convert to fraction form
    78,178.52/117,256.44 = 25,590.08/x
  3. Step 3: Cross multiply
    78,178.52x = 117,256.44 × 25,590.08
  4. Step 4: Simplify right side
    78,178.52x = 3,000,601,680.12
  5. Step 5: Solve for x
    x = 3,000,601,680.12/78,178.52
  6. Step 6: Final answer
    x = 38,381.41

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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.