Home / 78,103.24-117,156.32-28,187.08

Finding the Fourth Proportional to 78,103.24, 117,156.32 and 28,187.08

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Solution

The fourth proportional to 78,103.24, 117,156.32 and 28,187.08 is: 42,281.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,103.24 : 117,156.32 = 28,187.08 : x
  2. Step 2: Convert to fraction form
    78,103.24/117,156.32 = 28,187.08/x
  3. Step 3: Cross multiply
    78,103.24x = 117,156.32 × 28,187.08
  4. Step 4: Simplify right side
    78,103.24x = 3,302,294,564.35
  5. Step 5: Solve for x
    x = 3,302,294,564.35/78,103.24
  6. Step 6: Final answer
    x = 42,281.15

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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.