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Finding the Fourth Proportional to 128,810.31, 193,333.34 and 65,675.70

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Solution

The fourth proportional to 128,810.31, 193,333.34 and 65,675.70 is: 98,573.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,810.31 : 193,333.34 = 65,675.70 : x
  2. Step 2: Convert to fraction form
    128,810.31/193,333.34 = 65,675.70/x
  3. Step 3: Cross multiply
    128,810.31x = 193,333.34 × 65,675.70
  4. Step 4: Simplify right side
    128,810.31x = 12,697,302,109.46
  5. Step 5: Solve for x
    x = 12,697,302,109.46/128,810.31
  6. Step 6: Final answer
    x = 98,573.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.