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Finding the Fourth Proportional to 68,990.13, 103,465.17 and 26,860.80

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Solution

The fourth proportional to 68,990.13, 103,465.17 and 26,860.80 is: 40,283.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,990.13 : 103,465.17 = 26,860.80 : x
  2. Step 2: Convert to fraction form
    68,990.13/103,465.17 = 26,860.80/x
  3. Step 3: Cross multiply
    68,990.13x = 103,465.17 × 26,860.80
  4. Step 4: Simplify right side
    68,990.13x = 2,779,157,238.34
  5. Step 5: Solve for x
    x = 2,779,157,238.34/68,990.13
  6. Step 6: Final answer
    x = 40,283.40

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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.