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Finding the Fourth Proportional to 71,421.60, 98,582.40 and 43,129.44

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Solution

The fourth proportional to 71,421.60, 98,582.40 and 43,129.44 is: 59,531.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,421.60 : 98,582.40 = 43,129.44 : x
  2. Step 2: Convert to fraction form
    71,421.60/98,582.40 = 43,129.44/x
  3. Step 3: Cross multiply
    71,421.60x = 98,582.40 × 43,129.44
  4. Step 4: Simplify right side
    71,421.60x = 4,251,803,705.86
  5. Step 5: Solve for x
    x = 4,251,803,705.86/71,421.60
  6. Step 6: Final answer
    x = 59,531.06

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.