Home / 85,962,885.80-128,944,328.70-78,026,700.20

Finding the Fourth Proportional to 85,962,885.80, 128,944,328.70 and 78,026,700.20

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Solution

The fourth proportional to 85,962,885.80, 128,944,328.70 and 78,026,700.20 is: 117,040,050.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,962,885.80 : 128,944,328.70 = 78,026,700.20 : x
  2. Step 2: Convert to fraction form
    85,962,885.80/128,944,328.70 = 78,026,700.20/x
  3. Step 3: Cross multiply
    85,962,885.80x = 128,944,328.70 × 78,026,700.20
  4. Step 4: Simplify right side
    85,962,885.80x = 10,061,100,477,965,156
  5. Step 5: Solve for x
    x = 10,061,100,477,965,156/85,962,885.80
  6. Step 6: Final answer
    x = 117,040,050.30

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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.