Home / 129,130.89-178,205.19-71,771.35

Finding the Fourth Proportional to 129,130.89, 178,205.19 and 71,771.35

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Solution

The fourth proportional to 129,130.89, 178,205.19 and 71,771.35 is: 99,047.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,130.89 : 178,205.19 = 71,771.35 : x
  2. Step 2: Convert to fraction form
    129,130.89/178,205.19 = 71,771.35/x
  3. Step 3: Cross multiply
    129,130.89x = 178,205.19 × 71,771.35
  4. Step 4: Simplify right side
    129,130.89x = 12,790,027,063.31
  5. Step 5: Solve for x
    x = 12,790,027,063.31/129,130.89
  6. Step 6: Final answer
    x = 99,047.00

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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.