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Finding the Fourth Proportional to 65,780.10, 90,818.05 and 45,629.94

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Solution

The fourth proportional to 65,780.10, 90,818.05 and 45,629.94 is: 62,998.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,780.10 : 90,818.05 = 45,629.94 : x
  2. Step 2: Convert to fraction form
    65,780.10/90,818.05 = 45,629.94/x
  3. Step 3: Cross multiply
    65,780.10x = 90,818.05 × 45,629.94
  4. Step 4: Simplify right side
    65,780.10x = 4,144,022,172.42
  5. Step 5: Solve for x
    x = 4,144,022,172.42/65,780.10
  6. Step 6: Final answer
    x = 62,998.11

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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.