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Finding the Fourth Proportional to 154,328.86, 212,982.11 and 86,341.77

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Solution

The fourth proportional to 154,328.86, 212,982.11 and 86,341.77 is: 119,156.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,328.86 : 212,982.11 = 86,341.77 : x
  2. Step 2: Convert to fraction form
    154,328.86/212,982.11 = 86,341.77/x
  3. Step 3: Cross multiply
    154,328.86x = 212,982.11 × 86,341.77
  4. Step 4: Simplify right side
    154,328.86x = 18,389,252,573.63
  5. Step 5: Solve for x
    x = 18,389,252,573.63/154,328.86
  6. Step 6: Final answer
    x = 119,156.28

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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.