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Finding the Fourth Proportional to 68,708.40, 103,062.60 and 64,561.20

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Solution

The fourth proportional to 68,708.40, 103,062.60 and 64,561.20 is: 96,841.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,708.40 : 103,062.60 = 64,561.20 : x
  2. Step 2: Convert to fraction form
    68,708.40/103,062.60 = 64,561.20/x
  3. Step 3: Cross multiply
    68,708.40x = 103,062.60 × 64,561.20
  4. Step 4: Simplify right side
    68,708.40x = 6,653,845,131.12
  5. Step 5: Solve for x
    x = 6,653,845,131.12/68,708.40
  6. Step 6: Final answer
    x = 96,841.80

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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.