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Finding the Fourth Proportional to 162,239.68, 223,888.40 and 90,620.72

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Solution

The fourth proportional to 162,239.68, 223,888.40 and 90,620.72 is: 125,055.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    162,239.68 : 223,888.40 = 90,620.72 : x
  2. Step 2: Convert to fraction form
    162,239.68/223,888.40 = 90,620.72/x
  3. Step 3: Cross multiply
    162,239.68x = 223,888.40 × 90,620.72
  4. Step 4: Simplify right side
    162,239.68x = 20,288,928,007.65
  5. Step 5: Solve for x
    x = 20,288,928,007.65/162,239.68
  6. Step 6: Final answer
    x = 125,055.28

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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.