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Finding the Fourth Proportional to 153,256.46, 211,491.87 and 86,188.46

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Solution

The fourth proportional to 153,256.46, 211,491.87 and 86,188.46 is: 118,938.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,256.46 : 211,491.87 = 86,188.46 : x
  2. Step 2: Convert to fraction form
    153,256.46/211,491.87 = 86,188.46/x
  3. Step 3: Cross multiply
    153,256.46x = 211,491.87 × 86,188.46
  4. Step 4: Simplify right side
    153,256.46x = 18,228,157,520.36
  5. Step 5: Solve for x
    x = 18,228,157,520.36/153,256.46
  6. Step 6: Final answer
    x = 118,938.92

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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.