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Finding the Fourth Proportional to 72,379.67, 99,888.84 and 40,548.69

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Solution

The fourth proportional to 72,379.67, 99,888.84 and 40,548.69 is: 55,959.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,379.67 : 99,888.84 = 40,548.69 : x
  2. Step 2: Convert to fraction form
    72,379.67/99,888.84 = 40,548.69/x
  3. Step 3: Cross multiply
    72,379.67x = 99,888.84 × 40,548.69
  4. Step 4: Simplify right side
    72,379.67x = 4,050,361,607.62
  5. Step 5: Solve for x
    x = 4,050,361,607.62/72,379.67
  6. Step 6: Final answer
    x = 55,959.94

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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.