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Finding the Fourth Proportional to 101,461.52, 139,985.16 and 61,187.60

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Solution

The fourth proportional to 101,461.52, 139,985.16 and 61,187.60 is: 84,419.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,461.52 : 139,985.16 = 61,187.60 : x
  2. Step 2: Convert to fraction form
    101,461.52/139,985.16 = 61,187.60/x
  3. Step 3: Cross multiply
    101,461.52x = 139,985.16 × 61,187.60
  4. Step 4: Simplify right side
    101,461.52x = 8,565,355,976.02
  5. Step 5: Solve for x
    x = 8,565,355,976.02/101,461.52
  6. Step 6: Final answer
    x = 84,419.75

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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.