Home / 135,145.16-186,490.84-77,780.96

Finding the Fourth Proportional to 135,145.16, 186,490.84 and 77,780.96

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Solution

The fourth proportional to 135,145.16, 186,490.84 and 77,780.96 is: 107,332.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,145.16 : 186,490.84 = 77,780.96 : x
  2. Step 2: Convert to fraction form
    135,145.16/186,490.84 = 77,780.96/x
  3. Step 3: Cross multiply
    135,145.16x = 186,490.84 × 77,780.96
  4. Step 4: Simplify right side
    135,145.16x = 14,505,436,566.41
  5. Step 5: Solve for x
    x = 14,505,436,566.41/135,145.16
  6. Step 6: Final answer
    x = 107,332.27

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.