Home / 129,440.48-178,627.46-72,851.84

Finding the Fourth Proportional to 129,440.48, 178,627.46 and 72,851.84

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Solution

The fourth proportional to 129,440.48, 178,627.46 and 72,851.84 is: 100,535.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,440.48 : 178,627.46 = 72,851.84 : x
  2. Step 2: Convert to fraction form
    129,440.48/178,627.46 = 72,851.84/x
  3. Step 3: Cross multiply
    129,440.48x = 178,627.46 × 72,851.84
  4. Step 4: Simplify right side
    129,440.48x = 13,013,339,135.53
  5. Step 5: Solve for x
    x = 13,013,339,135.53/129,440.48
  6. Step 6: Final answer
    x = 100,535.31

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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.