Home / 100,812.81-139,122.18-55,495.35

Finding the Fourth Proportional to 100,812.81, 139,122.18 and 55,495.35

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Solution

The fourth proportional to 100,812.81, 139,122.18 and 55,495.35 is: 76,583.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,812.81 : 139,122.18 = 55,495.35 : x
  2. Step 2: Convert to fraction form
    100,812.81/139,122.18 = 55,495.35/x
  3. Step 3: Cross multiply
    100,812.81x = 139,122.18 × 55,495.35
  4. Step 4: Simplify right side
    100,812.81x = 7,720,634,071.86
  5. Step 5: Solve for x
    x = 7,720,634,071.86/100,812.81
  6. Step 6: Final answer
    x = 76,583.86

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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.