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Finding the Fourth Proportional to 85,019.40, 127,529.10 and 79,770.60

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Solution

The fourth proportional to 85,019.40, 127,529.10 and 79,770.60 is: 119,655.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,019.40 : 127,529.10 = 79,770.60 : x
  2. Step 2: Convert to fraction form
    85,019.40/127,529.10 = 79,770.60/x
  3. Step 3: Cross multiply
    85,019.40x = 127,529.10 × 79,770.60
  4. Step 4: Simplify right side
    85,019.40x = 10,173,072,824.46
  5. Step 5: Solve for x
    x = 10,173,072,824.46/85,019.40
  6. Step 6: Final answer
    x = 119,655.90

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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.