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Finding the Fourth Proportional to 76,141.99, 105,027.21 and 61,070.83

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Solution

The fourth proportional to 76,141.99, 105,027.21 and 61,070.83 is: 84,238.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,141.99 : 105,027.21 = 61,070.83 : x
  2. Step 2: Convert to fraction form
    76,141.99/105,027.21 = 61,070.83/x
  3. Step 3: Cross multiply
    76,141.99x = 105,027.21 × 61,070.83
  4. Step 4: Simplify right side
    76,141.99x = 6,414,098,624.72
  5. Step 5: Solve for x
    x = 6,414,098,624.72/76,141.99
  6. Step 6: Final answer
    x = 84,238.65

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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.