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Finding the Fourth Proportional to 287,124.99, 430,749.85 and 87,440.24

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Solution

The fourth proportional to 287,124.99, 430,749.85 and 87,440.24 is: 131,179.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,124.99 : 430,749.85 = 87,440.24 : x
  2. Step 2: Convert to fraction form
    287,124.99/430,749.85 = 87,440.24/x
  3. Step 3: Cross multiply
    287,124.99x = 430,749.85 × 87,440.24
  4. Step 4: Simplify right side
    287,124.99x = 37,664,871,286.19
  5. Step 5: Solve for x
    x = 37,664,871,286.19/287,124.99
  6. Step 6: Final answer
    x = 131,179.36

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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.