Home / 129,515.40-178,714.89-72,140.27

Finding the Fourth Proportional to 129,515.40, 178,714.89 and 72,140.27

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Solution

The fourth proportional to 129,515.40, 178,714.89 and 72,140.27 is: 99,544.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,515.40 : 178,714.89 = 72,140.27 : x
  2. Step 2: Convert to fraction form
    129,515.40/178,714.89 = 72,140.27/x
  3. Step 3: Cross multiply
    129,515.40x = 178,714.89 × 72,140.27
  4. Step 4: Simplify right side
    129,515.40x = 12,892,539,524.05
  5. Step 5: Solve for x
    x = 12,892,539,524.05/129,515.40
  6. Step 6: Final answer
    x = 99,544.45

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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.