Home / 86,056.38-129,006.81-30,639.42

Finding the Fourth Proportional to 86,056.38, 129,006.81 and 30,639.42

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Solution

The fourth proportional to 86,056.38, 129,006.81 and 30,639.42 is: 45,931.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,056.38 : 129,006.81 = 30,639.42 : x
  2. Step 2: Convert to fraction form
    86,056.38/129,006.81 = 30,639.42/x
  3. Step 3: Cross multiply
    86,056.38x = 129,006.81 × 30,639.42
  4. Step 4: Simplify right side
    86,056.38x = 3,952,693,834.45
  5. Step 5: Solve for x
    x = 3,952,693,834.45/86,056.38
  6. Step 6: Final answer
    x = 45,931.44

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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.