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Finding the Fourth Proportional to 156,578.99, 215,780.69 and 153,699.98

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Solution

The fourth proportional to 156,578.99, 215,780.69 and 153,699.98 is: 211,813.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,578.99 : 215,780.69 = 153,699.98 : x
  2. Step 2: Convert to fraction form
    156,578.99/215,780.69 = 153,699.98/x
  3. Step 3: Cross multiply
    156,578.99x = 215,780.69 × 153,699.98
  4. Step 4: Simplify right side
    156,578.99x = 33,165,485,889.98
  5. Step 5: Solve for x
    x = 33,165,485,889.98/156,578.99
  6. Step 6: Final answer
    x = 211,813.14

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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.