Home / 129,088.37-178,142.66-72,499.75

Finding the Fourth Proportional to 129,088.37, 178,142.66 and 72,499.75

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Solution

The fourth proportional to 129,088.37, 178,142.66 and 72,499.75 is: 100,050.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,088.37 : 178,142.66 = 72,499.75 : x
  2. Step 2: Convert to fraction form
    129,088.37/178,142.66 = 72,499.75/x
  3. Step 3: Cross multiply
    129,088.37x = 178,142.66 × 72,499.75
  4. Step 4: Simplify right side
    129,088.37x = 12,915,298,314.34
  5. Step 5: Solve for x
    x = 12,915,298,314.34/129,088.37
  6. Step 6: Final answer
    x = 100,050.05

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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.