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Finding the Fourth Proportional to 85,610.80, 117,897.96 and 61,699.60

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Solution

The fourth proportional to 85,610.80, 117,897.96 and 61,699.60 is: 84,968.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,610.80 : 117,897.96 = 61,699.60 : x
  2. Step 2: Convert to fraction form
    85,610.80/117,897.96 = 61,699.60/x
  3. Step 3: Cross multiply
    85,610.80x = 117,897.96 × 61,699.60
  4. Step 4: Simplify right side
    85,610.80x = 7,274,256,972.82
  5. Step 5: Solve for x
    x = 7,274,256,972.82/85,610.80
  6. Step 6: Final answer
    x = 84,968.92

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1.5x scale

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.