Home / 85,811.10-128,680.20-41,451.45

Finding the Fourth Proportional to 85,811.10, 128,680.20 and 41,451.45

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Solution

The fourth proportional to 85,811.10, 128,680.20 and 41,451.45 is: 62,159.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,811.10 : 128,680.20 = 41,451.45 : x
  2. Step 2: Convert to fraction form
    85,811.10/128,680.20 = 41,451.45/x
  3. Step 3: Cross multiply
    85,811.10x = 128,680.20 × 41,451.45
  4. Step 4: Simplify right side
    85,811.10x = 5,333,980,876.29
  5. Step 5: Solve for x
    x = 5,333,980,876.29/85,811.10
  6. Step 6: Final answer
    x = 62,159.57

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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.