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Finding the Fourth Proportional to 201,230.40, 302,191.20 and 142,478.40

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Solution

The fourth proportional to 201,230.40, 302,191.20 and 142,478.40 is: 213,962.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,230.40 : 302,191.20 = 142,478.40 : x
  2. Step 2: Convert to fraction form
    201,230.40/302,191.20 = 142,478.40/x
  3. Step 3: Cross multiply
    201,230.40x = 302,191.20 × 142,478.40
  4. Step 4: Simplify right side
    201,230.40x = 43,055,718,670.08
  5. Step 5: Solve for x
    x = 43,055,718,670.08/201,230.40
  6. Step 6: Final answer
    x = 213,962.30

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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.