Home / 129,392.12-178,546.68-72,802.28

Finding the Fourth Proportional to 129,392.12, 178,546.68 and 72,802.28

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Solution

The fourth proportional to 129,392.12, 178,546.68 and 72,802.28 is: 100,459.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,392.12 : 178,546.68 = 72,802.28 : x
  2. Step 2: Convert to fraction form
    129,392.12/178,546.68 = 72,802.28/x
  3. Step 3: Cross multiply
    129,392.12x = 178,546.68 × 72,802.28
  4. Step 4: Simplify right side
    129,392.12x = 12,998,605,390.43
  5. Step 5: Solve for x
    x = 12,998,605,390.43/129,392.12
  6. Step 6: Final answer
    x = 100,459.02

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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.