Home / 135,145.16-186,511.56-78,567.56

Finding the Fourth Proportional to 135,145.16, 186,511.56 and 78,567.56

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Solution

The fourth proportional to 135,145.16, 186,511.56 and 78,567.56 is: 108,429.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,145.16 : 186,511.56 = 78,567.56 : x
  2. Step 2: Convert to fraction form
    135,145.16/186,511.56 = 78,567.56/x
  3. Step 3: Cross multiply
    135,145.16x = 186,511.56 × 78,567.56
  4. Step 4: Simplify right side
    135,145.16x = 14,653,758,180.99
  5. Step 5: Solve for x
    x = 14,653,758,180.99/135,145.16
  6. Step 6: Final answer
    x = 108,429.77

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1.5x scale

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.