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Finding the Fourth Proportional to 86,906.88, 130,279.08 and 30,715.56

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Solution

The fourth proportional to 86,906.88, 130,279.08 and 30,715.56 is: 46,044.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,906.88 : 130,279.08 = 30,715.56 : x
  2. Step 2: Convert to fraction form
    86,906.88/130,279.08 = 30,715.56/x
  3. Step 3: Cross multiply
    86,906.88x = 130,279.08 × 30,715.56
  4. Step 4: Simplify right side
    86,906.88x = 4,001,594,898.48
  5. Step 5: Solve for x
    x = 4,001,594,898.48/86,906.88
  6. Step 6: Final answer
    x = 46,044.63

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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.