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Finding the Fourth Proportional to 61,886.16, 85,393.64 and 36,390.60

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Solution

The fourth proportional to 61,886.16, 85,393.64 and 36,390.60 is: 50,213.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,886.16 : 85,393.64 = 36,390.60 : x
  2. Step 2: Convert to fraction form
    61,886.16/85,393.64 = 36,390.60/x
  3. Step 3: Cross multiply
    61,886.16x = 85,393.64 × 36,390.60
  4. Step 4: Simplify right side
    61,886.16x = 3,107,525,886.76
  5. Step 5: Solve for x
    x = 3,107,525,886.76/61,886.16
  6. Step 6: Final answer
    x = 50,213.58

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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.