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Finding the Fourth Proportional to 128,604.84, 177,521.22 and 104,690.00

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Solution

The fourth proportional to 128,604.84, 177,521.22 and 104,690.00 is: 144,510.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,604.84 : 177,521.22 = 104,690.00 : x
  2. Step 2: Convert to fraction form
    128,604.84/177,521.22 = 104,690.00/x
  3. Step 3: Cross multiply
    128,604.84x = 177,521.22 × 104,690.00
  4. Step 4: Simplify right side
    128,604.84x = 18,584,695,634.19
  5. Step 5: Solve for x
    x = 18,584,695,634.19/128,604.84
  6. Step 6: Final answer
    x = 144,510.08

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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.