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Finding the Fourth Proportional to 128,084.40, 176,752.80 and 71,494.56

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Solution

The fourth proportional to 128,084.40, 176,752.80 and 71,494.56 is: 98,660.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,084.40 : 176,752.80 = 71,494.56 : x
  2. Step 2: Convert to fraction form
    128,084.40/176,752.80 = 71,494.56/x
  3. Step 3: Cross multiply
    128,084.40x = 176,752.80 × 71,494.56
  4. Step 4: Simplify right side
    128,084.40x = 12,636,863,664.77
  5. Step 5: Solve for x
    x = 12,636,863,664.77/128,084.40
  6. Step 6: Final answer
    x = 98,660.44

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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.