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Finding the Fourth Proportional to 153,989.23, 212,491.31 and 85,996.77

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Solution

The fourth proportional to 153,989.23, 212,491.31 and 85,996.77 is: 118,667.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,989.23 : 212,491.31 = 85,996.77 : x
  2. Step 2: Convert to fraction form
    153,989.23/212,491.31 = 85,996.77/x
  3. Step 3: Cross multiply
    153,989.23x = 212,491.31 × 85,996.77
  4. Step 4: Simplify right side
    153,989.23x = 18,273,566,437.95
  5. Step 5: Solve for x
    x = 18,273,566,437.95/153,989.23
  6. Step 6: Final answer
    x = 118,667.82

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Double scale
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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.