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Finding the Fourth Proportional to 128,950.48, 177,900.84 and 74,466.64

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Solution

The fourth proportional to 128,950.48, 177,900.84 and 74,466.64 is: 102,734.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,950.48 : 177,900.84 = 74,466.64 : x
  2. Step 2: Convert to fraction form
    128,950.48/177,900.84 = 74,466.64/x
  3. Step 3: Cross multiply
    128,950.48x = 177,900.84 × 74,466.64
  4. Step 4: Simplify right side
    128,950.48x = 13,247,677,807.98
  5. Step 5: Solve for x
    x = 13,247,677,807.98/128,950.48
  6. Step 6: Final answer
    x = 102,734.61

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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.