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Finding the Fourth Proportional to 85,365.40, 117,788.70 and 73,409.80

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Solution

The fourth proportional to 85,365.40, 117,788.70 and 73,409.80 is: 101,292.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,365.40 : 117,788.70 = 73,409.80 : x
  2. Step 2: Convert to fraction form
    85,365.40/117,788.70 = 73,409.80/x
  3. Step 3: Cross multiply
    85,365.40x = 117,788.70 × 73,409.80
  4. Step 4: Simplify right side
    85,365.40x = 8,646,844,909.26
  5. Step 5: Solve for x
    x = 8,646,844,909.26/85,365.40
  6. Step 6: Final answer
    x = 101,292.15

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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.