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Finding the Fourth Proportional to 86,780.70, 130,171.05 and 67,097.70

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Solution

The fourth proportional to 86,780.70, 130,171.05 and 67,097.70 is: 100,646.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,780.70 : 130,171.05 = 67,097.70 : x
  2. Step 2: Convert to fraction form
    86,780.70/130,171.05 = 67,097.70/x
  3. Step 3: Cross multiply
    86,780.70x = 130,171.05 × 67,097.70
  4. Step 4: Simplify right side
    86,780.70x = 8,734,178,061.59
  5. Step 5: Solve for x
    x = 8,734,178,061.59/86,780.70
  6. Step 6: Final answer
    x = 100,646.55

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1.5x scale

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.