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Finding the Fourth Proportional to 69,071.40, 103,683.90 and 42,805.80

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Solution

The fourth proportional to 69,071.40, 103,683.90 and 42,805.80 is: 64,256.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,071.40 : 103,683.90 = 42,805.80 : x
  2. Step 2: Convert to fraction form
    69,071.40/103,683.90 = 42,805.80/x
  3. Step 3: Cross multiply
    69,071.40x = 103,683.90 × 42,805.80
  4. Step 4: Simplify right side
    69,071.40x = 4,438,272,286.62
  5. Step 5: Solve for x
    x = 4,438,272,286.62/69,071.40
  6. Step 6: Final answer
    x = 64,256.30

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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.