Home / 129,459.72-178,658.80-71,313.86

Finding the Fourth Proportional to 129,459.72, 178,658.80 and 71,313.86

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Solution

The fourth proportional to 129,459.72, 178,658.80 and 71,313.86 is: 98,415.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,459.72 : 178,658.80 = 71,313.86 : x
  2. Step 2: Convert to fraction form
    129,459.72/178,658.80 = 71,313.86/x
  3. Step 3: Cross multiply
    129,459.72x = 178,658.80 × 71,313.86
  4. Step 4: Simplify right side
    129,459.72x = 12,740,848,650.97
  5. Step 5: Solve for x
    x = 12,740,848,650.97/129,459.72
  6. Step 6: Final answer
    x = 98,415.54

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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.