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Finding the Fourth Proportional to 61,489.96, 84,868.50 and 40,261.48

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Solution

The fourth proportional to 61,489.96, 84,868.50 and 40,261.48 is: 55,568.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,489.96 : 84,868.50 = 40,261.48 : x
  2. Step 2: Convert to fraction form
    61,489.96/84,868.50 = 40,261.48/x
  3. Step 3: Cross multiply
    61,489.96x = 84,868.50 × 40,261.48
  4. Step 4: Simplify right side
    61,489.96x = 3,416,931,415.38
  5. Step 5: Solve for x
    x = 3,416,931,415.38/61,489.96
  6. Step 6: Final answer
    x = 55,568.93

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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.