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Finding the Fourth Proportional to 156,907.58, 216,533.92 and 85,287.78

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Solution

The fourth proportional to 156,907.58, 216,533.92 and 85,287.78 is: 117,697.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,907.58 : 216,533.92 = 85,287.78 : x
  2. Step 2: Convert to fraction form
    156,907.58/216,533.92 = 85,287.78/x
  3. Step 3: Cross multiply
    156,907.58x = 216,533.92 × 85,287.78
  4. Step 4: Simplify right side
    156,907.58x = 18,467,697,331.50
  5. Step 5: Solve for x
    x = 18,467,697,331.50/156,907.58
  6. Step 6: Final answer
    x = 117,697.93

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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.