Home / 78,089.72-117,133.54-18,925.90

Finding the Fourth Proportional to 78,089.72, 117,133.54 and 18,925.90

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Solution

The fourth proportional to 78,089.72, 117,133.54 and 18,925.90 is: 28,388.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,089.72 : 117,133.54 = 18,925.90 : x
  2. Step 2: Convert to fraction form
    78,089.72/117,133.54 = 18,925.90/x
  3. Step 3: Cross multiply
    78,089.72x = 117,133.54 × 18,925.90
  4. Step 4: Simplify right side
    78,089.72x = 2,216,856,984.39
  5. Step 5: Solve for x
    x = 2,216,856,984.39/78,089.72
  6. Step 6: Final answer
    x = 28,388.59

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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.