Home / 131,878.08-181,979.79-78,154.44

Finding the Fourth Proportional to 131,878.08, 181,979.79 and 78,154.44

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Solution

The fourth proportional to 131,878.08, 181,979.79 and 78,154.44 is: 107,846.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,878.08 : 181,979.79 = 78,154.44 : x
  2. Step 2: Convert to fraction form
    131,878.08/181,979.79 = 78,154.44/x
  3. Step 3: Cross multiply
    131,878.08x = 181,979.79 × 78,154.44
  4. Step 4: Simplify right side
    131,878.08x = 14,222,528,578.77
  5. Step 5: Solve for x
    x = 14,222,528,578.77/131,878.08
  6. Step 6: Final answer
    x = 107,846.04

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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.