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Finding the Fourth Proportional to 72,245.82, 99,702.99 and 40,415.25

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Solution

The fourth proportional to 72,245.82, 99,702.99 and 40,415.25 is: 55,775.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,245.82 : 99,702.99 = 40,415.25 : x
  2. Step 2: Convert to fraction form
    72,245.82/99,702.99 = 40,415.25/x
  3. Step 3: Cross multiply
    72,245.82x = 99,702.99 × 40,415.25
  4. Step 4: Simplify right side
    72,245.82x = 4,029,521,266.60
  5. Step 5: Solve for x
    x = 4,029,521,266.60/72,245.82
  6. Step 6: Final answer
    x = 55,775.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.