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Finding the Fourth Proportional to 153,156.65, 211,358.43 and 85,181.04

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Solution

The fourth proportional to 153,156.65, 211,358.43 and 85,181.04 is: 117,551.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,156.65 : 211,358.43 = 85,181.04 : x
  2. Step 2: Convert to fraction form
    153,156.65/211,358.43 = 85,181.04/x
  3. Step 3: Cross multiply
    153,156.65x = 211,358.43 × 85,181.04
  4. Step 4: Simplify right side
    153,156.65x = 18,003,730,880.17
  5. Step 5: Solve for x
    x = 18,003,730,880.17/153,156.65
  6. Step 6: Final answer
    x = 117,551.09

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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.