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Finding the Fourth Proportional to 68,530.60, 102,623.10 and 65,420.20

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Solution

The fourth proportional to 68,530.60, 102,623.10 and 65,420.20 is: 97,965.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,530.60 : 102,623.10 = 65,420.20 : x
  2. Step 2: Convert to fraction form
    68,530.60/102,623.10 = 65,420.20/x
  3. Step 3: Cross multiply
    68,530.60x = 102,623.10 × 65,420.20
  4. Step 4: Simplify right side
    68,530.60x = 6,713,623,726.62
  5. Step 5: Solve for x
    x = 6,713,623,726.62/68,530.60
  6. Step 6: Final answer
    x = 97,965.34

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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.