Home / 100,754.60-139,041.36-55,431.62

Finding the Fourth Proportional to 100,754.60, 139,041.36 and 55,431.62

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Solution

The fourth proportional to 100,754.60, 139,041.36 and 55,431.62 is: 76,495.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,754.60 : 139,041.36 = 55,431.62 : x
  2. Step 2: Convert to fraction form
    100,754.60/139,041.36 = 55,431.62/x
  3. Step 3: Cross multiply
    100,754.60x = 139,041.36 × 55,431.62
  4. Step 4: Simplify right side
    100,754.60x = 7,707,287,831.80
  5. Step 5: Solve for x
    x = 7,707,287,831.80/100,754.60
  6. Step 6: Final answer
    x = 76,495.64

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Why These Related Problems?

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