Home / 129,016.84-178,033.41-72,417.28

Finding the Fourth Proportional to 129,016.84, 178,033.41 and 72,417.28

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Solution

The fourth proportional to 129,016.84, 178,033.41 and 72,417.28 is: 99,930.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,016.84 : 178,033.41 = 72,417.28 : x
  2. Step 2: Convert to fraction form
    129,016.84/178,033.41 = 72,417.28/x
  3. Step 3: Cross multiply
    129,016.84x = 178,033.41 × 72,417.28
  4. Step 4: Simplify right side
    129,016.84x = 12,892,695,301.32
  5. Step 5: Solve for x
    x = 12,892,695,301.32/129,016.84
  6. Step 6: Final answer
    x = 99,930.33

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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.