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Finding the Fourth Proportional to 76,896.81, 106,117.65 and 45,065.70

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Solution

The fourth proportional to 76,896.81, 106,117.65 and 45,065.70 is: 62,190.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,896.81 : 106,117.65 = 45,065.70 : x
  2. Step 2: Convert to fraction form
    76,896.81/106,117.65 = 45,065.70/x
  3. Step 3: Cross multiply
    76,896.81x = 106,117.65 × 45,065.70
  4. Step 4: Simplify right side
    76,896.81x = 4,782,266,179.61
  5. Step 5: Solve for x
    x = 4,782,266,179.61/76,896.81
  6. Step 6: Final answer
    x = 62,190.70

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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.