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Finding the Fourth Proportional to 61,804.64, 85,259 and 39,105.36

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Solution

The fourth proportional to 61,804.64, 85,259 and 39,105.36 is: 53,945.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,804.64 : 85,259 = 39,105.36 : x
  2. Step 2: Convert to fraction form
    61,804.64/85,259 = 39,105.36/x
  3. Step 3: Cross multiply
    61,804.64x = 85,259 × 39,105.36
  4. Step 4: Simplify right side
    61,804.64x = 3,334,083,888.24
  5. Step 5: Solve for x
    x = 3,334,083,888.24/61,804.64
  6. Step 6: Final answer
    x = 53,945.53

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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.