Home / 129,780.70-194,780.40-58,812.55

Finding the Fourth Proportional to 129,780.70, 194,780.40 and 58,812.55

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Solution

The fourth proportional to 129,780.70, 194,780.40 and 58,812.55 is: 88,268.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,780.70 : 194,780.40 = 58,812.55 : x
  2. Step 2: Convert to fraction form
    129,780.70/194,780.40 = 58,812.55/x
  3. Step 3: Cross multiply
    129,780.70x = 194,780.40 × 58,812.55
  4. Step 4: Simplify right side
    129,780.70x = 11,455,532,014.02
  5. Step 5: Solve for x
    x = 11,455,532,014.02/129,780.70
  6. Step 6: Final answer
    x = 88,268.38

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.