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Finding the Fourth Proportional to 47,292.40, 70,938.60 and 20,969.20

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Solution

The fourth proportional to 47,292.40, 70,938.60 and 20,969.20 is: 31,453.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,292.40 : 70,938.60 = 20,969.20 : x
  2. Step 2: Convert to fraction form
    47,292.40/70,938.60 = 20,969.20/x
  3. Step 3: Cross multiply
    47,292.40x = 70,938.60 × 20,969.20
  4. Step 4: Simplify right side
    47,292.40x = 1,487,525,691.12
  5. Step 5: Solve for x
    x = 1,487,525,691.12/47,292.40
  6. Step 6: Final answer
    x = 31,453.80

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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.