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Finding the Fourth Proportional to 52,912.40, 79,352.76 and 21,312.32

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Solution

The fourth proportional to 52,912.40, 79,352.76 and 21,312.32 is: 31,962.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,912.40 : 79,352.76 = 21,312.32 : x
  2. Step 2: Convert to fraction form
    52,912.40/79,352.76 = 21,312.32/x
  3. Step 3: Cross multiply
    52,912.40x = 79,352.76 × 21,312.32
  4. Step 4: Simplify right side
    52,912.40x = 1,691,191,414.00
  5. Step 5: Solve for x
    x = 1,691,191,414.00/52,912.40
  6. Step 6: Final answer
    x = 31,962.10

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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.