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Finding the Fourth Proportional to 128,273, 177,013.44 and 71,684.84

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Solution

The fourth proportional to 128,273, 177,013.44 and 71,684.84 is: 98,923.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,273 : 177,013.44 = 71,684.84 : x
  2. Step 2: Convert to fraction form
    128,273/177,013.44 = 71,684.84/x
  3. Step 3: Cross multiply
    128,273x = 177,013.44 × 71,684.84
  4. Step 4: Simplify right side
    128,273x = 12,689,180,124.25
  5. Step 5: Solve for x
    x = 12,689,180,124.25/128,273
  6. Step 6: Final answer
    x = 98,923.24

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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.