Home / 78,438.39-117,662.13-28,518.27

Finding the Fourth Proportional to 78,438.39, 117,662.13 and 28,518.27

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Solution

The fourth proportional to 78,438.39, 117,662.13 and 28,518.27 is: 42,779.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,438.39 : 117,662.13 = 28,518.27 : x
  2. Step 2: Convert to fraction form
    78,438.39/117,662.13 = 28,518.27/x
  3. Step 3: Cross multiply
    78,438.39x = 117,662.13 × 28,518.27
  4. Step 4: Simplify right side
    78,438.39x = 3,355,520,392.12
  5. Step 5: Solve for x
    x = 3,355,520,392.12/78,438.39
  6. Step 6: Final answer
    x = 42,779.06

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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.