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Finding the Fourth Proportional to 78,157.02, 117,235.52 and 18,992.28

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Solution

The fourth proportional to 78,157.02, 117,235.52 and 18,992.28 is: 28,488.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,157.02 : 117,235.52 = 18,992.28 : x
  2. Step 2: Convert to fraction form
    78,157.02/117,235.52 = 18,992.28/x
  3. Step 3: Cross multiply
    78,157.02x = 117,235.52 × 18,992.28
  4. Step 4: Simplify right side
    78,157.02x = 2,226,569,821.79
  5. Step 5: Solve for x
    x = 2,226,569,821.79/78,157.02
  6. Step 6: Final answer
    x = 28,488.42

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Similar ratio
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1.5x scale

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.