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Finding the Fourth Proportional to 92,757.10, 139,212.45 and 42,913.90

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Solution

The fourth proportional to 92,757.10, 139,212.45 and 42,913.90 is: 64,406.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,757.10 : 139,212.45 = 42,913.90 : x
  2. Step 2: Convert to fraction form
    92,757.10/139,212.45 = 42,913.90/x
  3. Step 3: Cross multiply
    92,757.10x = 139,212.45 × 42,913.90
  4. Step 4: Simplify right side
    92,757.10x = 5,974,149,158.06
  5. Step 5: Solve for x
    x = 5,974,149,158.06/92,757.10
  6. Step 6: Final answer
    x = 64,406.38

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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.