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Finding the Fourth Proportional to 67,970.40, 101,955.60 and 21,223.44

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Solution

The fourth proportional to 67,970.40, 101,955.60 and 21,223.44 is: 31,835.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,970.40 : 101,955.60 = 21,223.44 : x
  2. Step 2: Convert to fraction form
    67,970.40/101,955.60 = 21,223.44/x
  3. Step 3: Cross multiply
    67,970.40x = 101,955.60 × 21,223.44
  4. Step 4: Simplify right side
    67,970.40x = 2,163,848,559.26
  5. Step 5: Solve for x
    x = 2,163,848,559.26/67,970.40
  6. Step 6: Final answer
    x = 31,835.16

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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.