Home / 80,985.60-121,415.04-39,421.44

Finding the Fourth Proportional to 80,985.60, 121,415.04 and 39,421.44

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Solution

The fourth proportional to 80,985.60, 121,415.04 and 39,421.44 is: 59,101.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,985.60 : 121,415.04 = 39,421.44 : x
  2. Step 2: Convert to fraction form
    80,985.60/121,415.04 = 39,421.44/x
  3. Step 3: Cross multiply
    80,985.60x = 121,415.04 × 39,421.44
  4. Step 4: Simplify right side
    80,985.60x = 4,786,355,714.46
  5. Step 5: Solve for x
    x = 4,786,355,714.46/80,985.60
  6. Step 6: Final answer
    x = 59,101.32

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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.