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Finding the Fourth Proportional to 64,421.52, 88,819.40 and 41,720.40

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Solution

The fourth proportional to 64,421.52, 88,819.40 and 41,720.40 is: 57,520.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,421.52 : 88,819.40 = 41,720.40 : x
  2. Step 2: Convert to fraction form
    64,421.52/88,819.40 = 41,720.40/x
  3. Step 3: Cross multiply
    64,421.52x = 88,819.40 × 41,720.40
  4. Step 4: Simplify right side
    64,421.52x = 3,705,580,895.76
  5. Step 5: Solve for x
    x = 3,705,580,895.76/64,421.52
  6. Step 6: Final answer
    x = 57,520.85

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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.