Home / 85,962,875.80-128,944,313.70-78,026,690.20

Finding the Fourth Proportional to 85,962,875.80, 128,944,313.70 and 78,026,690.20

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Solution

The fourth proportional to 85,962,875.80, 128,944,313.70 and 78,026,690.20 is: 117,040,035.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,962,875.80 : 128,944,313.70 = 78,026,690.20 : x
  2. Step 2: Convert to fraction form
    85,962,875.80/128,944,313.70 = 78,026,690.20/x
  3. Step 3: Cross multiply
    85,962,875.80x = 128,944,313.70 × 78,026,690.20
  4. Step 4: Simplify right side
    85,962,875.80x = 10,061,098,018,121,516
  5. Step 5: Solve for x
    x = 10,061,098,018,121,516/85,962,875.80
  6. Step 6: Final answer
    x = 117,040,035.30

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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.