Home / 81,126.26-121,683.30-28,536.20

Finding the Fourth Proportional to 81,126.26, 121,683.30 and 28,536.20

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Solution

The fourth proportional to 81,126.26, 121,683.30 and 28,536.20 is: 42,802.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,126.26 : 121,683.30 = 28,536.20 : x
  2. Step 2: Convert to fraction form
    81,126.26/121,683.30 = 28,536.20/x
  3. Step 3: Cross multiply
    81,126.26x = 121,683.30 × 28,536.20
  4. Step 4: Simplify right side
    81,126.26x = 3,472,378,985.46
  5. Step 5: Solve for x
    x = 3,472,378,985.46/81,126.26
  6. Step 6: Final answer
    x = 42,802.16

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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.