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Finding the Fourth Proportional to 101,459.52, 139,982.40 and 61,185.60

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Solution

The fourth proportional to 101,459.52, 139,982.40 and 61,185.60 is: 84,416.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,459.52 : 139,982.40 = 61,185.60 : x
  2. Step 2: Convert to fraction form
    101,459.52/139,982.40 = 61,185.60/x
  3. Step 3: Cross multiply
    101,459.52x = 139,982.40 × 61,185.60
  4. Step 4: Simplify right side
    101,459.52x = 8,564,907,133.44
  5. Step 5: Solve for x
    x = 8,564,907,133.44/101,459.52
  6. Step 6: Final answer
    x = 84,416.99

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.