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Finding the Fourth Proportional to 86,641.80, 130,059.90 and 67,007.40

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Solution

The fourth proportional to 86,641.80, 130,059.90 and 67,007.40 is: 100,586.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,641.80 : 130,059.90 = 67,007.40 : x
  2. Step 2: Convert to fraction form
    86,641.80/130,059.90 = 67,007.40/x
  3. Step 3: Cross multiply
    86,641.80x = 130,059.90 × 67,007.40
  4. Step 4: Simplify right side
    86,641.80x = 8,714,975,743.26
  5. Step 5: Solve for x
    x = 8,714,975,743.26/86,641.80
  6. Step 6: Final answer
    x = 100,586.27

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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.