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Finding the Fourth Proportional to 165,740.60, 248,610.90 and 72,428.60

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Solution

The fourth proportional to 165,740.60, 248,610.90 and 72,428.60 is: 108,642.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    165,740.60 : 248,610.90 = 72,428.60 : x
  2. Step 2: Convert to fraction form
    165,740.60/248,610.90 = 72,428.60/x
  3. Step 3: Cross multiply
    165,740.60x = 248,610.90 × 72,428.60
  4. Step 4: Simplify right side
    165,740.60x = 18,006,539,431.74
  5. Step 5: Solve for x
    x = 18,006,539,431.74/165,740.60
  6. Step 6: Final answer
    x = 108,642.90

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1.5x scale

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.