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Finding the Fourth Proportional to 153,804.54, 212,228.64 and 85,813.50

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Solution

The fourth proportional to 153,804.54, 212,228.64 and 85,813.50 is: 118,410.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,804.54 : 212,228.64 = 85,813.50 : x
  2. Step 2: Convert to fraction form
    153,804.54/212,228.64 = 85,813.50/x
  3. Step 3: Cross multiply
    153,804.54x = 212,228.64 × 85,813.50
  4. Step 4: Simplify right side
    153,804.54x = 18,212,082,398.64
  5. Step 5: Solve for x
    x = 18,212,082,398.64/153,804.54
  6. Step 6: Final answer
    x = 118,410.56

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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.