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Finding the Fourth Proportional to 128,141.16, 176,818.32 and 71,554.92

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Solution

The fourth proportional to 128,141.16, 176,818.32 and 71,554.92 is: 98,736.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,141.16 : 176,818.32 = 71,554.92 : x
  2. Step 2: Convert to fraction form
    128,141.16/176,818.32 = 71,554.92/x
  3. Step 3: Cross multiply
    128,141.16x = 176,818.32 × 71,554.92
  4. Step 4: Simplify right side
    128,141.16x = 12,652,220,742.13
  5. Step 5: Solve for x
    x = 12,652,220,742.13/128,141.16
  6. Step 6: Final answer
    x = 98,736.59

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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.