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Finding the Fourth Proportional to 122,323.85, 183,485.78 and 103,661.45

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Solution

The fourth proportional to 122,323.85, 183,485.78 and 103,661.45 is: 155,492.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,323.85 : 183,485.78 = 103,661.45 : x
  2. Step 2: Convert to fraction form
    122,323.85/183,485.78 = 103,661.45/x
  3. Step 3: Cross multiply
    122,323.85x = 183,485.78 × 103,661.45
  4. Step 4: Simplify right side
    122,323.85x = 19,020,402,009.18
  5. Step 5: Solve for x
    x = 19,020,402,009.18/122,323.85
  6. Step 6: Final answer
    x = 155,492.18

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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.