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Finding the Fourth Proportional to 74,014.80, 111,240.90 and 72,702.60

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Solution

The fourth proportional to 74,014.80, 111,240.90 and 72,702.60 is: 109,268.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,014.80 : 111,240.90 = 72,702.60 : x
  2. Step 2: Convert to fraction form
    74,014.80/111,240.90 = 72,702.60/x
  3. Step 3: Cross multiply
    74,014.80x = 111,240.90 × 72,702.60
  4. Step 4: Simplify right side
    74,014.80x = 8,087,502,656.34
  5. Step 5: Solve for x
    x = 8,087,502,656.34/74,014.80
  6. Step 6: Final answer
    x = 109,268.72

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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.