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Finding the Fourth Proportional to 61,461.20, 92,220.60 and 31,912.40

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Solution

The fourth proportional to 61,461.20, 92,220.60 and 31,912.40 is: 47,883.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,461.20 : 92,220.60 = 31,912.40 : x
  2. Step 2: Convert to fraction form
    61,461.20/92,220.60 = 31,912.40/x
  3. Step 3: Cross multiply
    61,461.20x = 92,220.60 × 31,912.40
  4. Step 4: Simplify right side
    61,461.20x = 2,942,980,675.44
  5. Step 5: Solve for x
    x = 2,942,980,675.44/61,461.20
  6. Step 6: Final answer
    x = 47,883.55

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1.5x scale

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.