Home / 129,964.08-179,362.49-78,965.06

Finding the Fourth Proportional to 129,964.08, 179,362.49 and 78,965.06

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Solution

The fourth proportional to 129,964.08, 179,362.49 and 78,965.06 is: 108,979.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,964.08 : 179,362.49 = 78,965.06 : x
  2. Step 2: Convert to fraction form
    129,964.08/179,362.49 = 78,965.06/x
  3. Step 3: Cross multiply
    129,964.08x = 179,362.49 × 78,965.06
  4. Step 4: Simplify right side
    129,964.08x = 14,163,368,492.96
  5. Step 5: Solve for x
    x = 14,163,368,492.96/129,964.08
  6. Step 6: Final answer
    x = 108,979.10

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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.