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Finding the Fourth Proportional to 72,011.46, 99,374.94 and 45,169.68

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Solution

The fourth proportional to 72,011.46, 99,374.94 and 45,169.68 is: 62,333.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,011.46 : 99,374.94 = 45,169.68 : x
  2. Step 2: Convert to fraction form
    72,011.46/99,374.94 = 45,169.68/x
  3. Step 3: Cross multiply
    72,011.46x = 99,374.94 × 45,169.68
  4. Step 4: Simplify right side
    72,011.46x = 4,488,734,239.82
  5. Step 5: Solve for x
    x = 4,488,734,239.82/72,011.46
  6. Step 6: Final answer
    x = 62,333.61

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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.