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Finding the Fourth Proportional to 72,152.87, 99,506.49 and 45,297.88

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Solution

The fourth proportional to 72,152.87, 99,506.49 and 45,297.88 is: 62,470.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,152.87 : 99,506.49 = 45,297.88 : x
  2. Step 2: Convert to fraction form
    72,152.87/99,506.49 = 45,297.88/x
  3. Step 3: Cross multiply
    72,152.87x = 99,506.49 × 45,297.88
  4. Step 4: Simplify right side
    72,152.87x = 4,507,432,879.41
  5. Step 5: Solve for x
    x = 4,507,432,879.41/72,152.87
  6. Step 6: Final answer
    x = 62,470.60

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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.