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Finding the Fourth Proportional to 86,369.60, 129,233.64 and 75,790.16

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Solution

The fourth proportional to 86,369.60, 129,233.64 and 75,790.16 is: 113,403.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,369.60 : 129,233.64 = 75,790.16 : x
  2. Step 2: Convert to fraction form
    86,369.60/129,233.64 = 75,790.16/x
  3. Step 3: Cross multiply
    86,369.60x = 129,233.64 × 75,790.16
  4. Step 4: Simplify right side
    86,369.60x = 9,794,638,252.98
  5. Step 5: Solve for x
    x = 9,794,638,252.98/86,369.60
  6. Step 6: Final answer
    x = 113,403.77

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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.