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Finding the Fourth Proportional to 61,979, 85,529.38 and 35,120.84

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Solution

The fourth proportional to 61,979, 85,529.38 and 35,120.84 is: 48,465.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,979 : 85,529.38 = 35,120.84 : x
  2. Step 2: Convert to fraction form
    61,979/85,529.38 = 35,120.84/x
  3. Step 3: Cross multiply
    61,979x = 85,529.38 × 35,120.84
  4. Step 4: Simplify right side
    61,979x = 3,003,863,670.28
  5. Step 5: Solve for x
    x = 3,003,863,670.28/61,979
  6. Step 6: Final answer
    x = 48,465.83

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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.