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Finding the Fourth Proportional to 111,004.90, 153,084.51 and 72,750.51

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Solution

The fourth proportional to 111,004.90, 153,084.51 and 72,750.51 is: 100,328.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,004.90 : 153,084.51 = 72,750.51 : x
  2. Step 2: Convert to fraction form
    111,004.90/153,084.51 = 72,750.51/x
  3. Step 3: Cross multiply
    111,004.90x = 153,084.51 × 72,750.51
  4. Step 4: Simplify right side
    111,004.90x = 11,136,976,175.60
  5. Step 5: Solve for x
    x = 11,136,976,175.60/111,004.90
  6. Step 6: Final answer
    x = 100,328.69

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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.