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Finding the Fourth Proportional to 86,766.60, 130,149.90 and 72,004.35

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Solution

The fourth proportional to 86,766.60, 130,149.90 and 72,004.35 is: 108,006.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,766.60 : 130,149.90 = 72,004.35 : x
  2. Step 2: Convert to fraction form
    86,766.60/130,149.90 = 72,004.35/x
  3. Step 3: Cross multiply
    86,766.60x = 130,149.90 × 72,004.35
  4. Step 4: Simplify right side
    86,766.60x = 9,371,358,952.07
  5. Step 5: Solve for x
    x = 9,371,358,952.07/86,766.60
  6. Step 6: Final answer
    x = 108,006.53

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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.