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Finding the Fourth Proportional to 68,719.76, 103,091.94 and 35,430.88

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Solution

The fourth proportional to 68,719.76, 103,091.94 and 35,430.88 is: 53,152.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,719.76 : 103,091.94 = 35,430.88 : x
  2. Step 2: Convert to fraction form
    68,719.76/103,091.94 = 35,430.88/x
  3. Step 3: Cross multiply
    68,719.76x = 103,091.94 × 35,430.88
  4. Step 4: Simplify right side
    68,719.76x = 3,652,638,155.11
  5. Step 5: Solve for x
    x = 3,652,638,155.11/68,719.76
  6. Step 6: Final answer
    x = 53,152.66

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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.