Home / 205,539.40-308,078.70-87,190.60

Finding the Fourth Proportional to 205,539.40, 308,078.70 and 87,190.60

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Solution

The fourth proportional to 205,539.40, 308,078.70 and 87,190.60 is: 130,688.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,539.40 : 308,078.70 = 87,190.60 : x
  2. Step 2: Convert to fraction form
    205,539.40/308,078.70 = 87,190.60/x
  3. Step 3: Cross multiply
    205,539.40x = 308,078.70 × 87,190.60
  4. Step 4: Simplify right side
    205,539.40x = 26,861,566,700.22
  5. Step 5: Solve for x
    x = 26,861,566,700.22/205,539.40
  6. Step 6: Final answer
    x = 130,688.16

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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.