Home / 52,121.36-78,180.96-12,678.68

Finding the Fourth Proportional to 52,121.36, 78,180.96 and 12,678.68

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Solution

The fourth proportional to 52,121.36, 78,180.96 and 12,678.68 is: 19,017.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,121.36 : 78,180.96 = 12,678.68 : x
  2. Step 2: Convert to fraction form
    52,121.36/78,180.96 = 12,678.68/x
  3. Step 3: Cross multiply
    52,121.36x = 78,180.96 × 12,678.68
  4. Step 4: Simplify right side
    52,121.36x = 991,231,373.93
  5. Step 5: Solve for x
    x = 991,231,373.93/52,121.36
  6. Step 6: Final answer
    x = 19,017.76

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1.5x scale

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.