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Finding the Fourth Proportional to 61,430.70, 92,109.60 and 31,906.20

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Solution

The fourth proportional to 61,430.70, 92,109.60 and 31,906.20 is: 47,840.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,430.70 : 92,109.60 = 31,906.20 : x
  2. Step 2: Convert to fraction form
    61,430.70/92,109.60 = 31,906.20/x
  3. Step 3: Cross multiply
    61,430.70x = 92,109.60 × 31,906.20
  4. Step 4: Simplify right side
    61,430.70x = 2,938,867,319.52
  5. Step 5: Solve for x
    x = 2,938,867,319.52/61,430.70
  6. Step 6: Final answer
    x = 47,840.37

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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.