Home / 85,962,876.30-128,944,314.45-78,026,690.70

Finding the Fourth Proportional to 85,962,876.30, 128,944,314.45 and 78,026,690.70

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Solution

The fourth proportional to 85,962,876.30, 128,944,314.45 and 78,026,690.70 is: 117,040,036.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,962,876.30 : 128,944,314.45 = 78,026,690.70 : x
  2. Step 2: Convert to fraction form
    85,962,876.30/128,944,314.45 = 78,026,690.70/x
  3. Step 3: Cross multiply
    85,962,876.30x = 128,944,314.45 × 78,026,690.70
  4. Step 4: Simplify right side
    85,962,876.30x = 10,061,098,141,113,692
  5. Step 5: Solve for x
    x = 10,061,098,141,113,692/85,962,876.30
  6. Step 6: Final answer
    x = 117,040,036.05

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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.