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Finding the Fourth Proportional to 153,866.34, 212,346.23 and 85,896.68

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Solution

The fourth proportional to 153,866.34, 212,346.23 and 85,896.68 is: 118,543.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,866.34 : 212,346.23 = 85,896.68 : x
  2. Step 2: Convert to fraction form
    153,866.34/212,346.23 = 85,896.68/x
  3. Step 3: Cross multiply
    153,866.34x = 212,346.23 × 85,896.68
  4. Step 4: Simplify right side
    153,866.34x = 18,239,834,676.30
  5. Step 5: Solve for x
    x = 18,239,834,676.30/153,866.34
  6. Step 6: Final answer
    x = 118,543.37

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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.