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Finding the Fourth Proportional to 254,102.40, 381,328.80 and 87,890.40

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Solution

The fourth proportional to 254,102.40, 381,328.80 and 87,890.40 is: 131,896.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    254,102.40 : 381,328.80 = 87,890.40 : x
  2. Step 2: Convert to fraction form
    254,102.40/381,328.80 = 87,890.40/x
  3. Step 3: Cross multiply
    254,102.40x = 381,328.80 × 87,890.40
  4. Step 4: Simplify right side
    254,102.40x = 33,515,140,763.52
  5. Step 5: Solve for x
    x = 33,515,140,763.52/254,102.40
  6. Step 6: Final answer
    x = 131,896.20

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1.5x scale

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.