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Finding the Fourth Proportional to 129,903.01, 179,246.89 and 78,889.13

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Solution

The fourth proportional to 129,903.01, 179,246.89 and 78,889.13 is: 108,855.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,903.01 : 179,246.89 = 78,889.13 : x
  2. Step 2: Convert to fraction form
    129,903.01/179,246.89 = 78,889.13/x
  3. Step 3: Cross multiply
    129,903.01x = 179,246.89 × 78,889.13
  4. Step 4: Simplify right side
    129,903.01x = 14,140,631,207.31
  5. Step 5: Solve for x
    x = 14,140,631,207.31/129,903.01
  6. Step 6: Final answer
    x = 108,855.30

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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.