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Finding the Fourth Proportional to 136,779.84, 188,801.28 and 80,190

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Solution

The fourth proportional to 136,779.84, 188,801.28 and 80,190 is: 110,688.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,779.84 : 188,801.28 = 80,190 : x
  2. Step 2: Convert to fraction form
    136,779.84/188,801.28 = 80,190/x
  3. Step 3: Cross multiply
    136,779.84x = 188,801.28 × 80,190
  4. Step 4: Simplify right side
    136,779.84x = 15,139,974,643.20
  5. Step 5: Solve for x
    x = 15,139,974,643.20/136,779.84
  6. Step 6: Final answer
    x = 110,688.64

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