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Finding the Fourth Proportional to 68,708.33, 103,530.54 and 56,501.78

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Solution

The fourth proportional to 68,708.33, 103,530.54 and 56,501.78 is: 85,137.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,708.33 : 103,530.54 = 56,501.78 : x
  2. Step 2: Convert to fraction form
    68,708.33/103,530.54 = 56,501.78/x
  3. Step 3: Cross multiply
    68,708.33x = 103,530.54 × 56,501.78
  4. Step 4: Simplify right side
    68,708.33x = 5,849,660,053.19
  5. Step 5: Solve for x
    x = 5,849,660,053.19/68,708.33
  6. Step 6: Final answer
    x = 85,137.57

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.