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Finding the Fourth Proportional to 86,279.80, 129,438.10 and 48,857.40

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Solution

The fourth proportional to 86,279.80, 129,438.10 and 48,857.40 is: 73,296.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,279.80 : 129,438.10 = 48,857.40 : x
  2. Step 2: Convert to fraction form
    86,279.80/129,438.10 = 48,857.40/x
  3. Step 3: Cross multiply
    86,279.80x = 129,438.10 × 48,857.40
  4. Step 4: Simplify right side
    86,279.80x = 6,324,009,026.94
  5. Step 5: Solve for x
    x = 6,324,009,026.94/86,279.80
  6. Step 6: Final answer
    x = 73,296.52

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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.