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Finding the Fourth Proportional to 90,014.40, 135,021.60 and 82,432.80

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Solution

The fourth proportional to 90,014.40, 135,021.60 and 82,432.80 is: 123,649.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,014.40 : 135,021.60 = 82,432.80 : x
  2. Step 2: Convert to fraction form
    90,014.40/135,021.60 = 82,432.80/x
  3. Step 3: Cross multiply
    90,014.40x = 135,021.60 × 82,432.80
  4. Step 4: Simplify right side
    90,014.40x = 11,130,208,548.48
  5. Step 5: Solve for x
    x = 11,130,208,548.48/90,014.40
  6. Step 6: Final answer
    x = 123,649.20

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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.