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Finding the Fourth Proportional to 154,807.84, 213,637.16 and 86,839.88

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Solution

The fourth proportional to 154,807.84, 213,637.16 and 86,839.88 is: 119,840.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,807.84 : 213,637.16 = 86,839.88 : x
  2. Step 2: Convert to fraction form
    154,807.84/213,637.16 = 86,839.88/x
  3. Step 3: Cross multiply
    154,807.84x = 213,637.16 × 86,839.88
  4. Step 4: Simplify right side
    154,807.84x = 18,552,225,337.94
  5. Step 5: Solve for x
    x = 18,552,225,337.94/154,807.84
  6. Step 6: Final answer
    x = 119,840.35

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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.