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Finding the Fourth Proportional to 200,938.40, 301,705.20 and 112,368.80

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Solution

The fourth proportional to 200,938.40, 301,705.20 and 112,368.80 is: 168,719.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,938.40 : 301,705.20 = 112,368.80 : x
  2. Step 2: Convert to fraction form
    200,938.40/301,705.20 = 112,368.80/x
  3. Step 3: Cross multiply
    200,938.40x = 301,705.20 × 112,368.80
  4. Step 4: Simplify right side
    200,938.40x = 33,902,251,277.76
  5. Step 5: Solve for x
    x = 33,902,251,277.76/200,938.40
  6. Step 6: Final answer
    x = 168,719.62

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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.