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Finding the Fourth Proportional to 128,714.84, 177,634.72 and 71,356.56

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Solution

The fourth proportional to 128,714.84, 177,634.72 and 71,356.56 is: 98,476.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,714.84 : 177,634.72 = 71,356.56 : x
  2. Step 2: Convert to fraction form
    128,714.84/177,634.72 = 71,356.56/x
  3. Step 3: Cross multiply
    128,714.84x = 177,634.72 × 71,356.56
  4. Step 4: Simplify right side
    128,714.84x = 12,675,402,555.76
  5. Step 5: Solve for x
    x = 12,675,402,555.76/128,714.84
  6. Step 6: Final answer
    x = 98,476.62

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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.