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Finding the Fourth Proportional to 154,301.58, 212,935.05 and 86,318.28

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Solution

The fourth proportional to 154,301.58, 212,935.05 and 86,318.28 is: 119,118.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,301.58 : 212,935.05 = 86,318.28 : x
  2. Step 2: Convert to fraction form
    154,301.58/212,935.05 = 86,318.28/x
  3. Step 3: Cross multiply
    154,301.58x = 212,935.05 × 86,318.28
  4. Step 4: Simplify right side
    154,301.58x = 18,380,187,267.71
  5. Step 5: Solve for x
    x = 18,380,187,267.71/154,301.58
  6. Step 6: Final answer
    x = 119,118.59

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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.