Home / 78,930.90-108,927-43,122.60

Finding the Fourth Proportional to 78,930.90, 108,927 and 43,122.60

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Solution

The fourth proportional to 78,930.90, 108,927 and 43,122.60 is: 59,510.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,930.90 : 108,927 = 43,122.60 : x
  2. Step 2: Convert to fraction form
    78,930.90/108,927 = 43,122.60/x
  3. Step 3: Cross multiply
    78,930.90x = 108,927 × 43,122.60
  4. Step 4: Simplify right side
    78,930.90x = 4,697,215,450.20
  5. Step 5: Solve for x
    x = 4,697,215,450.20/78,930.90
  6. Step 6: Final answer
    x = 59,510.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.