Home / 85,731.65-128,680.52-41,389.55

Finding the Fourth Proportional to 85,731.65, 128,680.52 and 41,389.55

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Solution

The fourth proportional to 85,731.65, 128,680.52 and 41,389.55 is: 62,124.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,731.65 : 128,680.52 = 41,389.55 : x
  2. Step 2: Convert to fraction form
    85,731.65/128,680.52 = 41,389.55/x
  3. Step 3: Cross multiply
    85,731.65x = 128,680.52 × 41,389.55
  4. Step 4: Simplify right side
    85,731.65x = 5,326,028,448.77
  5. Step 5: Solve for x
    x = 5,326,028,448.77/85,731.65
  6. Step 6: Final answer
    x = 62,124.41

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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.