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Finding the Fourth Proportional to 86,407.48, 129,423.30 and 41,940.64

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Solution

The fourth proportional to 86,407.48, 129,423.30 and 41,940.64 is: 62,819.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,407.48 : 129,423.30 = 41,940.64 : x
  2. Step 2: Convert to fraction form
    86,407.48/129,423.30 = 41,940.64/x
  3. Step 3: Cross multiply
    86,407.48x = 129,423.30 × 41,940.64
  4. Step 4: Simplify right side
    86,407.48x = 5,428,096,032.91
  5. Step 5: Solve for x
    x = 5,428,096,032.91/86,407.48
  6. Step 6: Final answer
    x = 62,819.75

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1.5x scale

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.