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Finding the Fourth Proportional to 310,091.55, 465,137.33 and 85,451.55

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Solution

The fourth proportional to 310,091.55, 465,137.33 and 85,451.55 is: 128,177.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,091.55 : 465,137.33 = 85,451.55 : x
  2. Step 2: Convert to fraction form
    310,091.55/465,137.33 = 85,451.55/x
  3. Step 3: Cross multiply
    310,091.55x = 465,137.33 × 85,451.55
  4. Step 4: Simplify right side
    310,091.55x = 39,746,705,384.10
  5. Step 5: Solve for x
    x = 39,746,705,384.10/310,091.55
  6. Step 6: Final answer
    x = 128,177.33

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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.