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Finding the Fourth Proportional to 73,281.51, 109,743.12 and 66,181.86

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Solution

The fourth proportional to 73,281.51, 109,743.12 and 66,181.86 is: 99,111.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,281.51 : 109,743.12 = 66,181.86 : x
  2. Step 2: Convert to fraction form
    73,281.51/109,743.12 = 66,181.86/x
  3. Step 3: Cross multiply
    73,281.51x = 109,743.12 × 66,181.86
  4. Step 4: Simplify right side
    73,281.51x = 7,263,003,803.80
  5. Step 5: Solve for x
    x = 7,263,003,803.80/73,281.51
  6. Step 6: Final answer
    x = 99,111.00

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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.