Home / 137,968.72-190,397.59-80,611.40

Finding the Fourth Proportional to 137,968.72, 190,397.59 and 80,611.40

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Solution

The fourth proportional to 137,968.72, 190,397.59 and 80,611.40 is: 111,244.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,968.72 : 190,397.59 = 80,611.40 : x
  2. Step 2: Convert to fraction form
    137,968.72/190,397.59 = 80,611.40/x
  3. Step 3: Cross multiply
    137,968.72x = 190,397.59 × 80,611.40
  4. Step 4: Simplify right side
    137,968.72x = 15,348,216,560.99
  5. Step 5: Solve for x
    x = 15,348,216,560.99/137,968.72
  6. Step 6: Final answer
    x = 111,244.18

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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.