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Finding the Fourth Proportional to 42,954.70, 64,322.70 and 40,986.40

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Solution

The fourth proportional to 42,954.70, 64,322.70 and 40,986.40 is: 61,375.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,954.70 : 64,322.70 = 40,986.40 : x
  2. Step 2: Convert to fraction form
    42,954.70/64,322.70 = 40,986.40/x
  3. Step 3: Cross multiply
    42,954.70x = 64,322.70 × 40,986.40
  4. Step 4: Simplify right side
    42,954.70x = 2,636,355,911.28
  5. Step 5: Solve for x
    x = 2,636,355,911.28/42,954.70
  6. Step 6: Final answer
    x = 61,375.26

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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.