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Finding the Fourth Proportional to 74,289.80, 111,434.70 and 69,915.80

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Solution

The fourth proportional to 74,289.80, 111,434.70 and 69,915.80 is: 104,873.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,289.80 : 111,434.70 = 69,915.80 : x
  2. Step 2: Convert to fraction form
    74,289.80/111,434.70 = 69,915.80/x
  3. Step 3: Cross multiply
    74,289.80x = 111,434.70 × 69,915.80
  4. Step 4: Simplify right side
    74,289.80x = 7,791,046,198.26
  5. Step 5: Solve for x
    x = 7,791,046,198.26/74,289.80
  6. Step 6: Final answer
    x = 104,873.70

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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.