Home / 78,115.03-117,172.70-28,230.35

Finding the Fourth Proportional to 78,115.03, 117,172.70 and 28,230.35

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Solution

The fourth proportional to 78,115.03, 117,172.70 and 28,230.35 is: 42,345.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,115.03 : 117,172.70 = 28,230.35 : x
  2. Step 2: Convert to fraction form
    78,115.03/117,172.70 = 28,230.35/x
  3. Step 3: Cross multiply
    78,115.03x = 117,172.70 × 28,230.35
  4. Step 4: Simplify right side
    78,115.03x = 3,307,826,119.24
  5. Step 5: Solve for x
    x = 3,307,826,119.24/78,115.03
  6. Step 6: Final answer
    x = 42,345.58

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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.