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Finding the Fourth Proportional to 86,032.96, 129,064.64 and 39,290.56

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Solution

The fourth proportional to 86,032.96, 129,064.64 and 39,290.56 is: 58,942.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,032.96 : 129,064.64 = 39,290.56 : x
  2. Step 2: Convert to fraction form
    86,032.96/129,064.64 = 39,290.56/x
  3. Step 3: Cross multiply
    86,032.96x = 129,064.64 × 39,290.56
  4. Step 4: Simplify right side
    86,032.96x = 5,071,021,981.80
  5. Step 5: Solve for x
    x = 5,071,021,981.80/86,032.96
  6. Step 6: Final answer
    x = 58,942.78

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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.