Home / 129,395.08-178,553.40-75,670.76

Finding the Fourth Proportional to 129,395.08, 178,553.40 and 75,670.76

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Solution

The fourth proportional to 129,395.08, 178,553.40 and 75,670.76 is: 104,418.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,395.08 : 178,553.40 = 75,670.76 : x
  2. Step 2: Convert to fraction form
    129,395.08/178,553.40 = 75,670.76/x
  3. Step 3: Cross multiply
    129,395.08x = 178,553.40 × 75,670.76
  4. Step 4: Simplify right side
    129,395.08x = 13,511,271,478.58
  5. Step 5: Solve for x
    x = 13,511,271,478.58/129,395.08
  6. Step 6: Final answer
    x = 104,418.74

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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.