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Finding the Fourth Proportional to 122,403.76, 183,579.72 and 39,278.32

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Solution

The fourth proportional to 122,403.76, 183,579.72 and 39,278.32 is: 58,909.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,403.76 : 183,579.72 = 39,278.32 : x
  2. Step 2: Convert to fraction form
    122,403.76/183,579.72 = 39,278.32/x
  3. Step 3: Cross multiply
    122,403.76x = 183,579.72 × 39,278.32
  4. Step 4: Simplify right side
    122,403.76x = 7,210,702,987.67
  5. Step 5: Solve for x
    x = 7,210,702,987.67/122,403.76
  6. Step 6: Final answer
    x = 58,909.16

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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.