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Finding the Fourth Proportional to 85,034.60, 127,551.90 and 74,666.60

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Solution

The fourth proportional to 85,034.60, 127,551.90 and 74,666.60 is: 111,999.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,034.60 : 127,551.90 = 74,666.60 : x
  2. Step 2: Convert to fraction form
    85,034.60/127,551.90 = 74,666.60/x
  3. Step 3: Cross multiply
    85,034.60x = 127,551.90 × 74,666.60
  4. Step 4: Simplify right side
    85,034.60x = 9,523,866,696.54
  5. Step 5: Solve for x
    x = 9,523,866,696.54/85,034.60
  6. Step 6: Final answer
    x = 111,999.90

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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.