Home / 129,607.76-178,845-73,018.64

Finding the Fourth Proportional to 129,607.76, 178,845 and 73,018.64

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Solution

The fourth proportional to 129,607.76, 178,845 and 73,018.64 is: 100,758.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,607.76 : 178,845 = 73,018.64 : x
  2. Step 2: Convert to fraction form
    129,607.76/178,845 = 73,018.64/x
  3. Step 3: Cross multiply
    129,607.76x = 178,845 × 73,018.64
  4. Step 4: Simplify right side
    129,607.76x = 13,059,018,670.80
  5. Step 5: Solve for x
    x = 13,059,018,670.80/129,607.76
  6. Step 6: Final answer
    x = 100,758.00

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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.