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Finding the Fourth Proportional to 69,969.60, 104,985.42 and 36,681.72

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Solution

The fourth proportional to 69,969.60, 104,985.42 and 36,681.72 is: 55,038.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,969.60 : 104,985.42 = 36,681.72 : x
  2. Step 2: Convert to fraction form
    69,969.60/104,985.42 = 36,681.72/x
  3. Step 3: Cross multiply
    69,969.60x = 104,985.42 × 36,681.72
  4. Step 4: Simplify right side
    69,969.60x = 3,851,045,780.52
  5. Step 5: Solve for x
    x = 3,851,045,780.52/69,969.60
  6. Step 6: Final answer
    x = 55,038.84

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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.