Home / 135,144.66-186,510.87-78,567.06

Finding the Fourth Proportional to 135,144.66, 186,510.87 and 78,567.06

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Solution

The fourth proportional to 135,144.66, 186,510.87 and 78,567.06 is: 108,429.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,144.66 : 186,510.87 = 78,567.06 : x
  2. Step 2: Convert to fraction form
    135,144.66/186,510.87 = 78,567.06/x
  3. Step 3: Cross multiply
    135,144.66x = 186,510.87 × 78,567.06
  4. Step 4: Simplify right side
    135,144.66x = 14,653,610,713.94
  5. Step 5: Solve for x
    x = 14,653,610,713.94/135,144.66
  6. Step 6: Final answer
    x = 108,429.08

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.