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Finding the Fourth Proportional to 154,478.79, 213,163.11 and 86,486.31

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Solution

The fourth proportional to 154,478.79, 213,163.11 and 86,486.31 is: 119,341.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,478.79 : 213,163.11 = 86,486.31 : x
  2. Step 2: Convert to fraction form
    154,478.79/213,163.11 = 86,486.31/x
  3. Step 3: Cross multiply
    154,478.79x = 213,163.11 × 86,486.31
  4. Step 4: Simplify right side
    154,478.79x = 18,435,690,812.02
  5. Step 5: Solve for x
    x = 18,435,690,812.02/154,478.79
  6. Step 6: Final answer
    x = 119,341.24

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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.