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Finding the Fourth Proportional to 66,181.70, 99,129.98 and 31,068.74

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Solution

The fourth proportional to 66,181.70, 99,129.98 and 31,068.74 is: 46,536.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,181.70 : 99,129.98 = 31,068.74 : x
  2. Step 2: Convert to fraction form
    66,181.70/99,129.98 = 31,068.74/x
  3. Step 3: Cross multiply
    66,181.70x = 99,129.98 × 31,068.74
  4. Step 4: Simplify right side
    66,181.70x = 3,079,843,574.83
  5. Step 5: Solve for x
    x = 3,079,843,574.83/66,181.70
  6. Step 6: Final answer
    x = 46,536.18

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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.