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Finding the Fourth Proportional to 104,492.80, 156,739.20 and 77,881.60

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Solution

The fourth proportional to 104,492.80, 156,739.20 and 77,881.60 is: 116,822.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,492.80 : 156,739.20 = 77,881.60 : x
  2. Step 2: Convert to fraction form
    104,492.80/156,739.20 = 77,881.60/x
  3. Step 3: Cross multiply
    104,492.80x = 156,739.20 × 77,881.60
  4. Step 4: Simplify right side
    104,492.80x = 12,207,099,678.72
  5. Step 5: Solve for x
    x = 12,207,099,678.72/104,492.80
  6. Step 6: Final answer
    x = 116,822.40

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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.