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Finding the Fourth Proportional to 86,990.70, 130,486.05 and 24,661.74

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Solution

The fourth proportional to 86,990.70, 130,486.05 and 24,661.74 is: 36,992.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,990.70 : 130,486.05 = 24,661.74 : x
  2. Step 2: Convert to fraction form
    86,990.70/130,486.05 = 24,661.74/x
  3. Step 3: Cross multiply
    86,990.70x = 130,486.05 × 24,661.74
  4. Step 4: Simplify right side
    86,990.70x = 3,218,013,038.73
  5. Step 5: Solve for x
    x = 3,218,013,038.73/86,990.70
  6. Step 6: Final answer
    x = 36,992.61

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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.