Home / 129,425.05-178,661.69-87,008.19

Finding the Fourth Proportional to 129,425.05, 178,661.69 and 87,008.19

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Solution

The fourth proportional to 129,425.05, 178,661.69 and 87,008.19 is: 120,108.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,425.05 : 178,661.69 = 87,008.19 : x
  2. Step 2: Convert to fraction form
    129,425.05/178,661.69 = 87,008.19/x
  3. Step 3: Cross multiply
    129,425.05x = 178,661.69 × 87,008.19
  4. Step 4: Simplify right side
    129,425.05x = 15,545,029,490.50
  5. Step 5: Solve for x
    x = 15,545,029,490.50/129,425.05
  6. Step 6: Final answer
    x = 120,108.35

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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.