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Finding the Fourth Proportional to 61,421.87, 92,135.43 and 21,444.89

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Solution

The fourth proportional to 61,421.87, 92,135.43 and 21,444.89 is: 32,168.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,421.87 : 92,135.43 = 21,444.89 : x
  2. Step 2: Convert to fraction form
    61,421.87/92,135.43 = 21,444.89/x
  3. Step 3: Cross multiply
    61,421.87x = 92,135.43 × 21,444.89
  4. Step 4: Simplify right side
    61,421.87x = 1,975,833,700.78
  5. Step 5: Solve for x
    x = 1,975,833,700.78/61,421.87
  6. Step 6: Final answer
    x = 32,168.25

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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.