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Finding the Fourth Proportional to 129,393.08, 178,550.64 and 75,668.76

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Solution

The fourth proportional to 129,393.08, 178,550.64 and 75,668.76 is: 104,415.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,393.08 : 178,550.64 = 75,668.76 : x
  2. Step 2: Convert to fraction form
    129,393.08/178,550.64 = 75,668.76/x
  3. Step 3: Cross multiply
    129,393.08x = 178,550.64 × 75,668.76
  4. Step 4: Simplify right side
    129,393.08x = 13,510,705,526.01
  5. Step 5: Solve for x
    x = 13,510,705,526.01/129,393.08
  6. Step 6: Final answer
    x = 104,415.98

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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.