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Finding the Fourth Proportional to 153,318.15, 211,578.74 and 86,250.15

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Solution

The fourth proportional to 153,318.15, 211,578.74 and 86,250.15 is: 119,025.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,318.15 : 211,578.74 = 86,250.15 : x
  2. Step 2: Convert to fraction form
    153,318.15/211,578.74 = 86,250.15/x
  3. Step 3: Cross multiply
    153,318.15x = 211,578.74 × 86,250.15
  4. Step 4: Simplify right side
    153,318.15x = 18,248,697,630.56
  5. Step 5: Solve for x
    x = 18,248,697,630.56/153,318.15
  6. Step 6: Final answer
    x = 119,025.03

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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.