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Finding the Fourth Proportional to 310,099.80, 465,149.70 and 85,459.80

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Solution

The fourth proportional to 310,099.80, 465,149.70 and 85,459.80 is: 128,189.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,099.80 : 465,149.70 = 85,459.80 : x
  2. Step 2: Convert to fraction form
    310,099.80/465,149.70 = 85,459.80/x
  3. Step 3: Cross multiply
    310,099.80x = 465,149.70 × 85,459.80
  4. Step 4: Simplify right side
    310,099.80x = 39,751,600,332.06
  5. Step 5: Solve for x
    x = 39,751,600,332.06/310,099.80
  6. Step 6: Final answer
    x = 128,189.70

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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.