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Finding the Fourth Proportional to 128,604.27, 177,520.47 and 104,689.41

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Solution

The fourth proportional to 128,604.27, 177,520.47 and 104,689.41 is: 144,509.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,604.27 : 177,520.47 = 104,689.41 : x
  2. Step 2: Convert to fraction form
    128,604.27/177,520.47 = 104,689.41/x
  3. Step 3: Cross multiply
    128,604.27x = 177,520.47 × 104,689.41
  4. Step 4: Simplify right side
    128,604.27x = 18,584,513,267.22
  5. Step 5: Solve for x
    x = 18,584,513,267.22/128,604.27
  6. Step 6: Final answer
    x = 144,509.30

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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.