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Finding the Fourth Proportional to 128,897.45, 177,838.60 and 75,144.41

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Solution

The fourth proportional to 128,897.45, 177,838.60 and 75,144.41 is: 103,676.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,897.45 : 177,838.60 = 75,144.41 : x
  2. Step 2: Convert to fraction form
    128,897.45/177,838.60 = 75,144.41/x
  3. Step 3: Cross multiply
    128,897.45x = 177,838.60 × 75,144.41
  4. Step 4: Simplify right side
    128,897.45x = 13,363,576,672.23
  5. Step 5: Solve for x
    x = 13,363,576,672.23/128,897.45
  6. Step 6: Final answer
    x = 103,676.04

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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.