Home / 86,731.68-129,990.78-49,323

Finding the Fourth Proportional to 86,731.68, 129,990.78 and 49,323

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Solution

The fourth proportional to 86,731.68, 129,990.78 and 49,323 is: 73,923.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,731.68 : 129,990.78 = 49,323 : x
  2. Step 2: Convert to fraction form
    86,731.68/129,990.78 = 49,323/x
  3. Step 3: Cross multiply
    86,731.68x = 129,990.78 × 49,323
  4. Step 4: Simplify right side
    86,731.68x = 6,411,535,241.94
  5. Step 5: Solve for x
    x = 6,411,535,241.94/86,731.68
  6. Step 6: Final answer
    x = 73,923.80

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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.