Home / 103,973.20-155,207.69-91,361.90

Finding the Fourth Proportional to 103,973.20, 155,207.69 and 91,361.90

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Solution

The fourth proportional to 103,973.20, 155,207.69 and 91,361.90 is: 136,381.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,973.20 : 155,207.69 = 91,361.90 : x
  2. Step 2: Convert to fraction form
    103,973.20/155,207.69 = 91,361.90/x
  3. Step 3: Cross multiply
    103,973.20x = 155,207.69 × 91,361.90
  4. Step 4: Simplify right side
    103,973.20x = 14,180,069,453.01
  5. Step 5: Solve for x
    x = 14,180,069,453.01/103,973.20
  6. Step 6: Final answer
    x = 136,381.97

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.