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Finding the Fourth Proportional to 128,033.96, 176,685.89 and 74,323.98

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Solution

The fourth proportional to 128,033.96, 176,685.89 and 74,323.98 is: 102,566.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,033.96 : 176,685.89 = 74,323.98 : x
  2. Step 2: Convert to fraction form
    128,033.96/176,685.89 = 74,323.98/x
  3. Step 3: Cross multiply
    128,033.96x = 176,685.89 × 74,323.98
  4. Step 4: Simplify right side
    128,033.96x = 13,131,998,183.02
  5. Step 5: Solve for x
    x = 13,131,998,183.02/128,033.96
  6. Step 6: Final answer
    x = 102,566.53

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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.