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Finding the Fourth Proportional to 68,904.16, 103,353.90 and 19,656.16

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Solution

The fourth proportional to 68,904.16, 103,353.90 and 19,656.16 is: 29,483.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,904.16 : 103,353.90 = 19,656.16 : x
  2. Step 2: Convert to fraction form
    68,904.16/103,353.90 = 19,656.16/x
  3. Step 3: Cross multiply
    68,904.16x = 103,353.90 × 19,656.16
  4. Step 4: Simplify right side
    68,904.16x = 2,031,540,795.02
  5. Step 5: Solve for x
    x = 2,031,540,795.02/68,904.16
  6. Step 6: Final answer
    x = 29,483.57

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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.