Home / 129,257.69-193,688.48-86,981.36

Finding the Fourth Proportional to 129,257.69, 193,688.48 and 86,981.36

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Solution

The fourth proportional to 129,257.69, 193,688.48 and 86,981.36 is: 130,338.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,257.69 : 193,688.48 = 86,981.36 : x
  2. Step 2: Convert to fraction form
    129,257.69/193,688.48 = 86,981.36/x
  3. Step 3: Cross multiply
    129,257.69x = 193,688.48 × 86,981.36
  4. Step 4: Simplify right side
    129,257.69x = 16,847,286,655.74
  5. Step 5: Solve for x
    x = 16,847,286,655.74/129,257.69
  6. Step 6: Final answer
    x = 130,338.76

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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.