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Finding the Fourth Proportional to 64,805.55, 97,199.10 and 20,426.54

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Solution

The fourth proportional to 64,805.55, 97,199.10 and 20,426.54 is: 30,636.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,805.55 : 97,199.10 = 20,426.54 : x
  2. Step 2: Convert to fraction form
    64,805.55/97,199.10 = 20,426.54/x
  3. Step 3: Cross multiply
    64,805.55x = 97,199.10 × 20,426.54
  4. Step 4: Simplify right side
    64,805.55x = 1,985,440,741.52
  5. Step 5: Solve for x
    x = 1,985,440,741.52/64,805.55
  6. Step 6: Final answer
    x = 30,636.89

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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.