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Finding the Fourth Proportional to 128,033.64, 176,686.41 and 70,672.95

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Solution

The fourth proportional to 128,033.64, 176,686.41 and 70,672.95 is: 97,528.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,033.64 : 176,686.41 = 70,672.95 : x
  2. Step 2: Convert to fraction form
    128,033.64/176,686.41 = 70,672.95/x
  3. Step 3: Cross multiply
    128,033.64x = 176,686.41 × 70,672.95
  4. Step 4: Simplify right side
    128,033.64x = 12,486,949,819.61
  5. Step 5: Solve for x
    x = 12,486,949,819.61/128,033.64
  6. Step 6: Final answer
    x = 97,528.66

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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.