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Finding the Fourth Proportional to 153,880.61, 212,355.80 and 85,896.36

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Solution

The fourth proportional to 153,880.61, 212,355.80 and 85,896.36 is: 118,537.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,880.61 : 212,355.80 = 85,896.36 : x
  2. Step 2: Convert to fraction form
    153,880.61/212,355.80 = 85,896.36/x
  3. Step 3: Cross multiply
    153,880.61x = 212,355.80 × 85,896.36
  4. Step 4: Simplify right side
    153,880.61x = 18,240,590,459.63
  5. Step 5: Solve for x
    x = 18,240,590,459.63/153,880.61
  6. Step 6: Final answer
    x = 118,537.29

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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.