Home / 76,153.22-105,146.89-61,128.53

Finding the Fourth Proportional to 76,153.22, 105,146.89 and 61,128.53

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Solution

The fourth proportional to 76,153.22, 105,146.89 and 61,128.53 is: 84,401.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,153.22 : 105,146.89 = 61,128.53 : x
  2. Step 2: Convert to fraction form
    76,153.22/105,146.89 = 61,128.53/x
  3. Step 3: Cross multiply
    76,153.22x = 105,146.89 × 61,128.53
  4. Step 4: Simplify right side
    76,153.22x = 6,427,474,514.13
  5. Step 5: Solve for x
    x = 6,427,474,514.13/76,153.22
  6. Step 6: Final answer
    x = 84,401.87

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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.