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Finding the Fourth Proportional to 123,303.91, 170,141.15 and 74,880.65

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Solution

The fourth proportional to 123,303.91, 170,141.15 and 74,880.65 is: 103,324.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,303.91 : 170,141.15 = 74,880.65 : x
  2. Step 2: Convert to fraction form
    123,303.91/170,141.15 = 74,880.65/x
  3. Step 3: Cross multiply
    123,303.91x = 170,141.15 × 74,880.65
  4. Step 4: Simplify right side
    123,303.91x = 12,740,279,529.34
  5. Step 5: Solve for x
    x = 12,740,279,529.34/123,303.91
  6. Step 6: Final answer
    x = 103,324.22

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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.