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Finding the Fourth Proportional to 86,747.70, 130,121.55 and 67,064.70

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Solution

The fourth proportional to 86,747.70, 130,121.55 and 67,064.70 is: 100,597.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,747.70 : 130,121.55 = 67,064.70 : x
  2. Step 2: Convert to fraction form
    86,747.70/130,121.55 = 67,064.70/x
  3. Step 3: Cross multiply
    86,747.70x = 130,121.55 × 67,064.70
  4. Step 4: Simplify right side
    86,747.70x = 8,726,562,714.29
  5. Step 5: Solve for x
    x = 8,726,562,714.29/86,747.70
  6. Step 6: Final answer
    x = 100,597.05

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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.