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Finding the Fourth Proportional to 111,113.90, 166,670.85 and 103,678.10

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Solution

The fourth proportional to 111,113.90, 166,670.85 and 103,678.10 is: 155,517.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,113.90 : 166,670.85 = 103,678.10 : x
  2. Step 2: Convert to fraction form
    111,113.90/166,670.85 = 103,678.10/x
  3. Step 3: Cross multiply
    111,113.90x = 166,670.85 × 103,678.10
  4. Step 4: Simplify right side
    111,113.90x = 17,280,117,053.39
  5. Step 5: Solve for x
    x = 17,280,117,053.39/111,113.90
  6. Step 6: Final answer
    x = 155,517.15

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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.