Home / 129,386.26-178,551.03-72,797.77

Finding the Fourth Proportional to 129,386.26, 178,551.03 and 72,797.77

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Solution

The fourth proportional to 129,386.26, 178,551.03 and 72,797.77 is: 100,459.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,386.26 : 178,551.03 = 72,797.77 : x
  2. Step 2: Convert to fraction form
    129,386.26/178,551.03 = 72,797.77/x
  3. Step 3: Cross multiply
    129,386.26x = 178,551.03 × 72,797.77
  4. Step 4: Simplify right side
    129,386.26x = 12,998,116,815.20
  5. Step 5: Solve for x
    x = 12,998,116,815.20/129,386.26
  6. Step 6: Final answer
    x = 100,459.79

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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.