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Finding the Fourth Proportional to 137,015.16, 205,005.95 and 80,885.80

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Solution

The fourth proportional to 137,015.16, 205,005.95 and 80,885.80 is: 121,023.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,015.16 : 205,005.95 = 80,885.80 : x
  2. Step 2: Convert to fraction form
    137,015.16/205,005.95 = 80,885.80/x
  3. Step 3: Cross multiply
    137,015.16x = 205,005.95 × 80,885.80
  4. Step 4: Simplify right side
    137,015.16x = 16,582,070,270.51
  5. Step 5: Solve for x
    x = 16,582,070,270.51/137,015.16
  6. Step 6: Final answer
    x = 121,023.62

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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.