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Finding the Fourth Proportional to 85,888.55, 128,841.66 and 29,728.57

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Solution

The fourth proportional to 85,888.55, 128,841.66 and 29,728.57 is: 44,595.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,888.55 : 128,841.66 = 29,728.57 : x
  2. Step 2: Convert to fraction form
    85,888.55/128,841.66 = 29,728.57/x
  3. Step 3: Cross multiply
    85,888.55x = 128,841.66 × 29,728.57
  4. Step 4: Simplify right side
    85,888.55x = 3,830,278,308.23
  5. Step 5: Solve for x
    x = 3,830,278,308.23/85,888.55
  6. Step 6: Final answer
    x = 44,595.91

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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.