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Finding the Fourth Proportional to 72,195.45, 99,630 and 40,364.27

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Solution

The fourth proportional to 72,195.45, 99,630 and 40,364.27 is: 55,702.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,195.45 : 99,630 = 40,364.27 : x
  2. Step 2: Convert to fraction form
    72,195.45/99,630 = 40,364.27/x
  3. Step 3: Cross multiply
    72,195.45x = 99,630 × 40,364.27
  4. Step 4: Simplify right side
    72,195.45x = 4,021,492,655.98
  5. Step 5: Solve for x
    x = 4,021,492,655.98/72,195.45
  6. Step 6: Final answer
    x = 55,702.85

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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.