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Finding the Fourth Proportional to 122,459.60, 183,797.40 and 72,477.20

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Solution

The fourth proportional to 122,459.60, 183,797.40 and 72,477.20 is: 108,779.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,459.60 : 183,797.40 = 72,477.20 : x
  2. Step 2: Convert to fraction form
    122,459.60/183,797.40 = 72,477.20/x
  3. Step 3: Cross multiply
    122,459.60x = 183,797.40 × 72,477.20
  4. Step 4: Simplify right side
    122,459.60x = 13,321,120,919.28
  5. Step 5: Solve for x
    x = 13,321,120,919.28/122,459.60
  6. Step 6: Final answer
    x = 108,779.72

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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.