Home / 129,383.61-178,548.12-72,022.02

Finding the Fourth Proportional to 129,383.61, 178,548.12 and 72,022.02

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Solution

The fourth proportional to 129,383.61, 178,548.12 and 72,022.02 is: 99,389.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,383.61 : 178,548.12 = 72,022.02 : x
  2. Step 2: Convert to fraction form
    129,383.61/178,548.12 = 72,022.02/x
  3. Step 3: Cross multiply
    129,383.61x = 178,548.12 × 72,022.02
  4. Step 4: Simplify right side
    129,383.61x = 12,859,396,269.60
  5. Step 5: Solve for x
    x = 12,859,396,269.60/129,383.61
  6. Step 6: Final answer
    x = 99,389.69

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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.