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Finding the Fourth Proportional to 65,308.44, 90,135.50 and 39,829.59

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Solution

The fourth proportional to 65,308.44, 90,135.50 and 39,829.59 is: 54,970.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,308.44 : 90,135.50 = 39,829.59 : x
  2. Step 2: Convert to fraction form
    65,308.44/90,135.50 = 39,829.59/x
  3. Step 3: Cross multiply
    65,308.44x = 90,135.50 × 39,829.59
  4. Step 4: Simplify right side
    65,308.44x = 3,590,059,810.30
  5. Step 5: Solve for x
    x = 3,590,059,810.30/65,308.44
  6. Step 6: Final answer
    x = 54,970.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.