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Finding the Fourth Proportional to 153,616, 212,000.80 and 86,548.16

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Solution

The fourth proportional to 153,616, 212,000.80 and 86,548.16 is: 119,442.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,616 : 212,000.80 = 86,548.16 : x
  2. Step 2: Convert to fraction form
    153,616/212,000.80 = 86,548.16/x
  3. Step 3: Cross multiply
    153,616x = 212,000.80 × 86,548.16
  4. Step 4: Simplify right side
    153,616x = 18,348,279,158.53
  5. Step 5: Solve for x
    x = 18,348,279,158.53/153,616
  6. Step 6: Final answer
    x = 119,442.50

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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.