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Finding the Fourth Proportional to 129,681.84, 179,005.20 and 75,983.96

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Solution

The fourth proportional to 129,681.84, 179,005.20 and 75,983.96 is: 104,883.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,681.84 : 179,005.20 = 75,983.96 : x
  2. Step 2: Convert to fraction form
    129,681.84/179,005.20 = 75,983.96/x
  3. Step 3: Cross multiply
    129,681.84x = 179,005.20 × 75,983.96
  4. Step 4: Simplify right side
    129,681.84x = 13,601,523,956.59
  5. Step 5: Solve for x
    x = 13,601,523,956.59/129,681.84
  6. Step 6: Final answer
    x = 104,883.80

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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.