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Finding the Fourth Proportional to 154,398.86, 213,021.87 and 86,405.03

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Solution

The fourth proportional to 154,398.86, 213,021.87 and 86,405.03 is: 119,211.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,398.86 : 213,021.87 = 86,405.03 : x
  2. Step 2: Convert to fraction form
    154,398.86/213,021.87 = 86,405.03/x
  3. Step 3: Cross multiply
    154,398.86x = 213,021.87 × 86,405.03
  4. Step 4: Simplify right side
    154,398.86x = 18,406,161,068.01
  5. Step 5: Solve for x
    x = 18,406,161,068.01/154,398.86
  6. Step 6: Final answer
    x = 119,211.77

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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.