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Finding the Fourth Proportional to 92,485.80, 138,728.70 and 66,241.80

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Solution

The fourth proportional to 92,485.80, 138,728.70 and 66,241.80 is: 99,362.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,485.80 : 138,728.70 = 66,241.80 : x
  2. Step 2: Convert to fraction form
    92,485.80/138,728.70 = 66,241.80/x
  3. Step 3: Cross multiply
    92,485.80x = 138,728.70 × 66,241.80
  4. Step 4: Simplify right side
    92,485.80x = 9,189,638,799.66
  5. Step 5: Solve for x
    x = 9,189,638,799.66/92,485.80
  6. Step 6: Final answer
    x = 99,362.70

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1.5x scale

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.