Home / 78,721.08-117,559.83-69,182.52

Finding the Fourth Proportional to 78,721.08, 117,559.83 and 69,182.52

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Solution

The fourth proportional to 78,721.08, 117,559.83 and 69,182.52 is: 103,315.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,721.08 : 117,559.83 = 69,182.52 : x
  2. Step 2: Convert to fraction form
    78,721.08/117,559.83 = 69,182.52/x
  3. Step 3: Cross multiply
    78,721.08x = 117,559.83 × 69,182.52
  4. Step 4: Simplify right side
    78,721.08x = 8,133,085,290.17
  5. Step 5: Solve for x
    x = 8,133,085,290.17/78,721.08
  6. Step 6: Final answer
    x = 103,315.21

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.