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Finding the Fourth Proportional to 122,720.40, 183,821.40 and 101,984.40

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Solution

The fourth proportional to 122,720.40, 183,821.40 and 101,984.40 is: 152,761.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,720.40 : 183,821.40 = 101,984.40 : x
  2. Step 2: Convert to fraction form
    122,720.40/183,821.40 = 101,984.40/x
  3. Step 3: Cross multiply
    122,720.40x = 183,821.40 × 101,984.40
  4. Step 4: Simplify right side
    122,720.40x = 18,746,915,186.16
  5. Step 5: Solve for x
    x = 18,746,915,186.16/122,720.40
  6. Step 6: Final answer
    x = 152,761.20

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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.