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Finding the Fourth Proportional to 76,953.49, 115,439.43 and 72,754.45

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Solution

The fourth proportional to 76,953.49, 115,439.43 and 72,754.45 is: 109,140.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,953.49 : 115,439.43 = 72,754.45 : x
  2. Step 2: Convert to fraction form
    76,953.49/115,439.43 = 72,754.45/x
  3. Step 3: Cross multiply
    76,953.49x = 115,439.43 × 72,754.45
  4. Step 4: Simplify right side
    76,953.49x = 8,398,732,237.96
  5. Step 5: Solve for x
    x = 8,398,732,237.96/76,953.49
  6. Step 6: Final answer
    x = 109,140.37

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1.5x scale

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.