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Finding the Fourth Proportional to 200,895.40, 301,688.70 and 142,143.40

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Solution

The fourth proportional to 200,895.40, 301,688.70 and 142,143.40 is: 213,459.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,895.40 : 301,688.70 = 142,143.40 : x
  2. Step 2: Convert to fraction form
    200,895.40/301,688.70 = 142,143.40/x
  3. Step 3: Cross multiply
    200,895.40x = 301,688.70 × 142,143.40
  4. Step 4: Simplify right side
    200,895.40x = 42,883,057,559.58
  5. Step 5: Solve for x
    x = 42,883,057,559.58/200,895.40
  6. Step 6: Final answer
    x = 213,459.63

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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.