Home / 78,003,992.70-117,005,989.05-55,329,176.70

Finding the Fourth Proportional to 78,003,992.70, 117,005,989.05 and 55,329,176.70

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Solution

The fourth proportional to 78,003,992.70, 117,005,989.05 and 55,329,176.70 is: 82,993,765.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,003,992.70 : 117,005,989.05 = 55,329,176.70 : x
  2. Step 2: Convert to fraction form
    78,003,992.70/117,005,989.05 = 55,329,176.70/x
  3. Step 3: Cross multiply
    78,003,992.70x = 117,005,989.05 × 55,329,176.70
  4. Step 4: Simplify right side
    78,003,992.70x = 6,473,845,043,105,715
  5. Step 5: Solve for x
    x = 6,473,845,043,105,715/78,003,992.70
  6. Step 6: Final answer
    x = 82,993,765.05

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1.5x scale

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.