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Finding the Fourth Proportional to 153,657, 212,059.62 and 86,601.96

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Solution

The fourth proportional to 153,657, 212,059.62 and 86,601.96 is: 119,518.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,657 : 212,059.62 = 86,601.96 : x
  2. Step 2: Convert to fraction form
    153,657/212,059.62 = 86,601.96/x
  3. Step 3: Cross multiply
    153,657x = 212,059.62 × 86,601.96
  4. Step 4: Simplify right side
    153,657x = 18,364,778,728.86
  5. Step 5: Solve for x
    x = 18,364,778,728.86/153,657
  6. Step 6: Final answer
    x = 119,518.01

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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.