Home / 100,747.16-139,032.78-55,428.92

Finding the Fourth Proportional to 100,747.16, 139,032.78 and 55,428.92

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Solution

The fourth proportional to 100,747.16, 139,032.78 and 55,428.92 is: 76,492.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,747.16 : 139,032.78 = 55,428.92 : x
  2. Step 2: Convert to fraction form
    100,747.16/139,032.78 = 55,428.92/x
  3. Step 3: Cross multiply
    100,747.16x = 139,032.78 × 55,428.92
  4. Step 4: Simplify right side
    100,747.16x = 7,706,436,840.00
  5. Step 5: Solve for x
    x = 7,706,436,840.00/100,747.16
  6. Step 6: Final answer
    x = 76,492.84

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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.