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Finding the Fourth Proportional to 156,900.66, 216,522.93 and 85,280.65

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Solution

The fourth proportional to 156,900.66, 216,522.93 and 85,280.65 is: 117,687.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,900.66 : 216,522.93 = 85,280.65 : x
  2. Step 2: Convert to fraction form
    156,900.66/216,522.93 = 85,280.65/x
  3. Step 3: Cross multiply
    156,900.66x = 216,522.93 × 85,280.65
  4. Step 4: Simplify right side
    156,900.66x = 18,465,216,210.30
  5. Step 5: Solve for x
    x = 18,465,216,210.30/156,900.66
  6. Step 6: Final answer
    x = 117,687.31

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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.