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Finding the Fourth Proportional to 134,620.92, 201,708.18 and 81,870.84

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Solution

The fourth proportional to 134,620.92, 201,708.18 and 81,870.84 is: 122,670.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,620.92 : 201,708.18 = 81,870.84 : x
  2. Step 2: Convert to fraction form
    134,620.92/201,708.18 = 81,870.84/x
  3. Step 3: Cross multiply
    134,620.92x = 201,708.18 × 81,870.84
  4. Step 4: Simplify right side
    134,620.92x = 16,514,018,131.47
  5. Step 5: Solve for x
    x = 16,514,018,131.47/134,620.92
  6. Step 6: Final answer
    x = 122,670.52

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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.