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Finding the Fourth Proportional to 201,125.40, 301,428.90 and 154,145.40

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Solution

The fourth proportional to 201,125.40, 301,428.90 and 154,145.40 is: 231,019.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,125.40 : 301,428.90 = 154,145.40 : x
  2. Step 2: Convert to fraction form
    201,125.40/301,428.90 = 154,145.40/x
  3. Step 3: Cross multiply
    201,125.40x = 301,428.90 × 154,145.40
  4. Step 4: Simplify right side
    201,125.40x = 46,463,878,362.06
  5. Step 5: Solve for x
    x = 46,463,878,362.06/201,125.40
  6. Step 6: Final answer
    x = 231,019.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.