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Finding the Fourth Proportional to 110,893.81, 152,980.11 and 72,636.80

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Solution

The fourth proportional to 110,893.81, 152,980.11 and 72,636.80 is: 100,203.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    110,893.81 : 152,980.11 = 72,636.80 : x
  2. Step 2: Convert to fraction form
    110,893.81/152,980.11 = 72,636.80/x
  3. Step 3: Cross multiply
    110,893.81x = 152,980.11 × 72,636.80
  4. Step 4: Simplify right side
    110,893.81x = 11,111,985,654.05
  5. Step 5: Solve for x
    x = 11,111,985,654.05/110,893.81
  6. Step 6: Final answer
    x = 100,203.84

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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.