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Finding the Fourth Proportional to 76,430.98, 114,619.19 and 31,439.19

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Solution

The fourth proportional to 76,430.98, 114,619.19 and 31,439.19 is: 47,147.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,430.98 : 114,619.19 = 31,439.19 : x
  2. Step 2: Convert to fraction form
    76,430.98/114,619.19 = 31,439.19/x
  3. Step 3: Cross multiply
    76,430.98x = 114,619.19 × 31,439.19
  4. Step 4: Simplify right side
    76,430.98x = 3,603,534,252.58
  5. Step 5: Solve for x
    x = 3,603,534,252.58/76,430.98
  6. Step 6: Final answer
    x = 47,147.56

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.