Home / 103,628.10-155,480.55-99,788.10

Finding the Fourth Proportional to 103,628.10, 155,480.55 and 99,788.10

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Solution

The fourth proportional to 103,628.10, 155,480.55 and 99,788.10 is: 149,719.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,628.10 : 155,480.55 = 99,788.10 : x
  2. Step 2: Convert to fraction form
    103,628.10/155,480.55 = 99,788.10/x
  3. Step 3: Cross multiply
    103,628.10x = 155,480.55 × 99,788.10
  4. Step 4: Simplify right side
    103,628.10x = 15,515,108,671.46
  5. Step 5: Solve for x
    x = 15,515,108,671.46/103,628.10
  6. Step 6: Final answer
    x = 149,719.13

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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.