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Finding the Fourth Proportional to 225,957.42, 311,810.78 and 123,980.34

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Solution

The fourth proportional to 225,957.42, 311,810.78 and 123,980.34 is: 171,087.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,957.42 : 311,810.78 = 123,980.34 : x
  2. Step 2: Convert to fraction form
    225,957.42/311,810.78 = 123,980.34/x
  3. Step 3: Cross multiply
    225,957.42x = 311,810.78 × 123,980.34
  4. Step 4: Simplify right side
    225,957.42x = 38,658,406,520.07
  5. Step 5: Solve for x
    x = 38,658,406,520.07/225,957.42
  6. Step 6: Final answer
    x = 171,087.13

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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.