Home / 111,981.90-167,972.85-103,428.30

Finding the Fourth Proportional to 111,981.90, 167,972.85 and 103,428.30

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Solution

The fourth proportional to 111,981.90, 167,972.85 and 103,428.30 is: 155,142.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,981.90 : 167,972.85 = 103,428.30 : x
  2. Step 2: Convert to fraction form
    111,981.90/167,972.85 = 103,428.30/x
  3. Step 3: Cross multiply
    111,981.90x = 167,972.85 × 103,428.30
  4. Step 4: Simplify right side
    111,981.90x = 17,373,146,321.66
  5. Step 5: Solve for x
    x = 17,373,146,321.66/111,981.90
  6. Step 6: Final answer
    x = 155,142.45

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1.5x scale

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.