Home / 78,633,187.20-117,949,780.80-70,980,436.80

Finding the Fourth Proportional to 78,633,187.20, 117,949,780.80 and 70,980,436.80

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Solution

The fourth proportional to 78,633,187.20, 117,949,780.80 and 70,980,436.80 is: 106,470,655.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,633,187.20 : 117,949,780.80 = 70,980,436.80 : x
  2. Step 2: Convert to fraction form
    78,633,187.20/117,949,780.80 = 70,980,436.80/x
  3. Step 3: Cross multiply
    78,633,187.20x = 117,949,780.80 × 70,980,436.80
  4. Step 4: Simplify right side
    78,633,187.20x = 8,372,126,961,648,253
  5. Step 5: Solve for x
    x = 8,372,126,961,648,253/78,633,187.20
  6. Step 6: Final answer
    x = 106,470,655.20

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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.