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Finding the Fourth Proportional to 129,775.67, 179,090.91 and 72,417.41

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Solution

The fourth proportional to 129,775.67, 179,090.91 and 72,417.41 is: 99,936.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,775.67 : 179,090.91 = 72,417.41 : x
  2. Step 2: Convert to fraction form
    129,775.67/179,090.91 = 72,417.41/x
  3. Step 3: Cross multiply
    129,775.67x = 179,090.91 × 72,417.41
  4. Step 4: Simplify right side
    129,775.67x = 12,969,298,961.29
  5. Step 5: Solve for x
    x = 12,969,298,961.29/129,775.67
  6. Step 6: Final answer
    x = 99,936.29

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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.