Home / 129,249.28-178,368.14-78,271.52

Finding the Fourth Proportional to 129,249.28, 178,368.14 and 78,271.52

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Solution

The fourth proportional to 129,249.28, 178,368.14 and 78,271.52 is: 108,017.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,249.28 : 178,368.14 = 78,271.52 : x
  2. Step 2: Convert to fraction form
    129,249.28/178,368.14 = 78,271.52/x
  3. Step 3: Cross multiply
    129,249.28x = 178,368.14 × 78,271.52
  4. Step 4: Simplify right side
    129,249.28x = 13,961,145,437.37
  5. Step 5: Solve for x
    x = 13,961,145,437.37/129,249.28
  6. Step 6: Final answer
    x = 108,017.20

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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.