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Finding the Fourth Proportional to 128,779.60, 193,169.40 and 57,702.10

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Solution

The fourth proportional to 128,779.60, 193,169.40 and 57,702.10 is: 86,553.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,779.60 : 193,169.40 = 57,702.10 : x
  2. Step 2: Convert to fraction form
    128,779.60/193,169.40 = 57,702.10/x
  3. Step 3: Cross multiply
    128,779.60x = 193,169.40 × 57,702.10
  4. Step 4: Simplify right side
    128,779.60x = 11,146,280,035.74
  5. Step 5: Solve for x
    x = 11,146,280,035.74/128,779.60
  6. Step 6: Final answer
    x = 86,553.15

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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.