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Finding the Fourth Proportional to 42,590.40, 63,770.40 and 33,374.40

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Solution

The fourth proportional to 42,590.40, 63,770.40 and 33,374.40 is: 49,971.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,590.40 : 63,770.40 = 33,374.40 : x
  2. Step 2: Convert to fraction form
    42,590.40/63,770.40 = 33,374.40/x
  3. Step 3: Cross multiply
    42,590.40x = 63,770.40 × 33,374.40
  4. Step 4: Simplify right side
    42,590.40x = 2,128,298,837.76
  5. Step 5: Solve for x
    x = 2,128,298,837.76/42,590.40
  6. Step 6: Final answer
    x = 49,971.33

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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.