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Finding the Fourth Proportional to 76,605.57, 105,686.67 and 47,520.49

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Solution

The fourth proportional to 76,605.57, 105,686.67 and 47,520.49 is: 65,560.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,605.57 : 105,686.67 = 47,520.49 : x
  2. Step 2: Convert to fraction form
    76,605.57/105,686.67 = 47,520.49/x
  3. Step 3: Cross multiply
    76,605.57x = 105,686.67 × 47,520.49
  4. Step 4: Simplify right side
    76,605.57x = 5,022,282,344.87
  5. Step 5: Solve for x
    x = 5,022,282,344.87/76,605.57
  6. Step 6: Final answer
    x = 65,560.28

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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.