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Finding the Fourth Proportional to 223,915.65, 308,989.58 and 123,313.65

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Solution

The fourth proportional to 223,915.65, 308,989.58 and 123,313.65 is: 170,165.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,915.65 : 308,989.58 = 123,313.65 : x
  2. Step 2: Convert to fraction form
    223,915.65/308,989.58 = 123,313.65/x
  3. Step 3: Cross multiply
    223,915.65x = 308,989.58 × 123,313.65
  4. Step 4: Simplify right side
    223,915.65x = 38,102,632,921.77
  5. Step 5: Solve for x
    x = 38,102,632,921.77/223,915.65
  6. Step 6: Final answer
    x = 170,165.12

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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.