Home / 78,351.13-117,573.38-28,435.12

Finding the Fourth Proportional to 78,351.13, 117,573.38 and 28,435.12

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Solution

The fourth proportional to 78,351.13, 117,573.38 and 28,435.12 is: 42,669.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,351.13 : 117,573.38 = 28,435.12 : x
  2. Step 2: Convert to fraction form
    78,351.13/117,573.38 = 28,435.12/x
  3. Step 3: Cross multiply
    78,351.13x = 117,573.38 × 28,435.12
  4. Step 4: Simplify right side
    78,351.13x = 3,343,213,169.11
  5. Step 5: Solve for x
    x = 3,343,213,169.11/78,351.13
  6. Step 6: Final answer
    x = 42,669.62

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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.