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Finding the Fourth Proportional to 287,181.51, 430,739.51 and 76,835.67

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Solution

The fourth proportional to 287,181.51, 430,739.51 and 76,835.67 is: 115,244.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,181.51 : 430,739.51 = 76,835.67 : x
  2. Step 2: Convert to fraction form
    287,181.51/430,739.51 = 76,835.67/x
  3. Step 3: Cross multiply
    287,181.51x = 430,739.51 × 76,835.67
  4. Step 4: Simplify right side
    287,181.51x = 33,096,158,462.14
  5. Step 5: Solve for x
    x = 33,096,158,462.14/287,181.51
  6. Step 6: Final answer
    x = 115,244.74

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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.