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Finding the Fourth Proportional to 154,655.34, 213,439.35 and 86,683.86

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Solution

The fourth proportional to 154,655.34, 213,439.35 and 86,683.86 is: 119,632.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,655.34 : 213,439.35 = 86,683.86 : x
  2. Step 2: Convert to fraction form
    154,655.34/213,439.35 = 86,683.86/x
  3. Step 3: Cross multiply
    154,655.34x = 213,439.35 × 86,683.86
  4. Step 4: Simplify right side
    154,655.34x = 18,501,746,733.89
  5. Step 5: Solve for x
    x = 18,501,746,733.89/154,655.34
  6. Step 6: Final answer
    x = 119,632.12

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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.