Home / 81,315.09-112,279.37-54,117.32

Finding the Fourth Proportional to 81,315.09, 112,279.37 and 54,117.32

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Solution

The fourth proportional to 81,315.09, 112,279.37 and 54,117.32 is: 74,724.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,315.09 : 112,279.37 = 54,117.32 : x
  2. Step 2: Convert to fraction form
    81,315.09/112,279.37 = 54,117.32/x
  3. Step 3: Cross multiply
    81,315.09x = 112,279.37 × 54,117.32
  4. Step 4: Simplify right side
    81,315.09x = 6,076,257,763.70
  5. Step 5: Solve for x
    x = 6,076,257,763.70/81,315.09
  6. Step 6: Final answer
    x = 74,724.85

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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.