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Finding the Fourth Proportional to 128,951.84, 177,907.92 and 84,265.76

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Solution

The fourth proportional to 128,951.84, 177,907.92 and 84,265.76 is: 116,256.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,951.84 : 177,907.92 = 84,265.76 : x
  2. Step 2: Convert to fraction form
    128,951.84/177,907.92 = 84,265.76/x
  3. Step 3: Cross multiply
    128,951.84x = 177,907.92 × 84,265.76
  4. Step 4: Simplify right side
    128,951.84x = 14,991,546,088.82
  5. Step 5: Solve for x
    x = 14,991,546,088.82/128,951.84
  6. Step 6: Final answer
    x = 116,256.94

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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.