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Finding the Fourth Proportional to 86,990.92, 130,393.10 and 56,993.83

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Solution

The fourth proportional to 86,990.92, 130,393.10 and 56,993.83 is: 85,429.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,990.92 : 130,393.10 = 56,993.83 : x
  2. Step 2: Convert to fraction form
    86,990.92/130,393.10 = 56,993.83/x
  3. Step 3: Cross multiply
    86,990.92x = 130,393.10 × 56,993.83
  4. Step 4: Simplify right side
    86,990.92x = 7,431,602,174.57
  5. Step 5: Solve for x
    x = 7,431,602,174.57/86,990.92
  6. Step 6: Final answer
    x = 85,429.63

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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.