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Finding the Fourth Proportional to 78,756,714.80, 118,099,642.80 and 30,218,436.80

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Solution

The fourth proportional to 78,756,714.80, 118,099,642.80 and 30,218,436.80 is: 45,314,061.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,756,714.80 : 118,099,642.80 = 30,218,436.80 : x
  2. Step 2: Convert to fraction form
    78,756,714.80/118,099,642.80 = 30,218,436.80/x
  3. Step 3: Cross multiply
    78,756,714.80x = 118,099,642.80 × 30,218,436.80
  4. Step 4: Simplify right side
    78,756,714.80x = 3,568,786,592,054,375
  5. Step 5: Solve for x
    x = 3,568,786,592,054,375/78,756,714.80
  6. Step 6: Final answer
    x = 45,314,061.17

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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.