Home / 81,142.26-121,701.08-28,539.45

Finding the Fourth Proportional to 81,142.26, 121,701.08 and 28,539.45

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Solution

The fourth proportional to 81,142.26, 121,701.08 and 28,539.45 is: 42,804.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,142.26 : 121,701.08 = 28,539.45 : x
  2. Step 2: Convert to fraction form
    81,142.26/121,701.08 = 28,539.45/x
  3. Step 3: Cross multiply
    81,142.26x = 121,701.08 × 28,539.45
  4. Step 4: Simplify right side
    81,142.26x = 3,473,281,744.91
  5. Step 5: Solve for x
    x = 3,473,281,744.91/81,142.26
  6. Step 6: Final answer
    x = 42,804.84

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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.