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Finding the Fourth Proportional to 310,057.12, 465,000.60 and 85,364.80

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Solution

The fourth proportional to 310,057.12, 465,000.60 and 85,364.80 is: 128,023.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,057.12 : 465,000.60 = 85,364.80 : x
  2. Step 2: Convert to fraction form
    310,057.12/465,000.60 = 85,364.80/x
  3. Step 3: Cross multiply
    310,057.12x = 465,000.60 × 85,364.80
  4. Step 4: Simplify right side
    310,057.12x = 39,694,683,218.88
  5. Step 5: Solve for x
    x = 39,694,683,218.88/310,057.12
  6. Step 6: Final answer
    x = 128,023.78

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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.