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Finding the Fourth Proportional to 156,891.99, 216,509.64 and 85,272.45

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Solution

The fourth proportional to 156,891.99, 216,509.64 and 85,272.45 is: 117,675.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,891.99 : 216,509.64 = 85,272.45 : x
  2. Step 2: Convert to fraction form
    156,891.99/216,509.64 = 85,272.45/x
  3. Step 3: Cross multiply
    156,891.99x = 216,509.64 × 85,272.45
  4. Step 4: Simplify right side
    156,891.99x = 18,462,307,451.42
  5. Step 5: Solve for x
    x = 18,462,307,451.42/156,891.99
  6. Step 6: Final answer
    x = 117,675.27

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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.