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Finding the Fourth Proportional to 72,148.50, 99,563 and 40,317.66

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Solution

The fourth proportional to 72,148.50, 99,563 and 40,317.66 is: 55,637.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,148.50 : 99,563 = 40,317.66 : x
  2. Step 2: Convert to fraction form
    72,148.50/99,563 = 40,317.66/x
  3. Step 3: Cross multiply
    72,148.50x = 99,563 × 40,317.66
  4. Step 4: Simplify right side
    72,148.50x = 4,014,147,182.58
  5. Step 5: Solve for x
    x = 4,014,147,182.58/72,148.50
  6. Step 6: Final answer
    x = 55,637.29

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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.