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Finding the Fourth Proportional to 154,667.43, 213,458.76 and 86,702.76

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Solution

The fourth proportional to 154,667.43, 213,458.76 and 86,702.76 is: 119,659.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,667.43 : 213,458.76 = 86,702.76 : x
  2. Step 2: Convert to fraction form
    154,667.43/213,458.76 = 86,702.76/x
  3. Step 3: Cross multiply
    154,667.43x = 213,458.76 × 86,702.76
  4. Step 4: Simplify right side
    154,667.43x = 18,507,463,638.18
  5. Step 5: Solve for x
    x = 18,507,463,638.18/154,667.43
  6. Step 6: Final answer
    x = 119,659.73

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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.