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Finding the Fourth Proportional to 77,405.80, 116,108.70 and 49,412.20

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Solution

The fourth proportional to 77,405.80, 116,108.70 and 49,412.20 is: 74,118.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,405.80 : 116,108.70 = 49,412.20 : x
  2. Step 2: Convert to fraction form
    77,405.80/116,108.70 = 49,412.20/x
  3. Step 3: Cross multiply
    77,405.80x = 116,108.70 × 49,412.20
  4. Step 4: Simplify right side
    77,405.80x = 5,737,186,306.14
  5. Step 5: Solve for x
    x = 5,737,186,306.14/77,405.80
  6. Step 6: Final answer
    x = 74,118.30

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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.