Home / 85,534,846.20-128,018,834.10-78,732,401.40

Finding the Fourth Proportional to 85,534,846.20, 128,018,834.10 and 78,732,401.40

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Solution

The fourth proportional to 85,534,846.20, 128,018,834.10 and 78,732,401.40 is: 117,837,708.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,534,846.20 : 128,018,834.10 = 78,732,401.40 : x
  2. Step 2: Convert to fraction form
    85,534,846.20/128,018,834.10 = 78,732,401.40/x
  3. Step 3: Cross multiply
    85,534,846.20x = 128,018,834.10 × 78,732,401.40
  4. Step 4: Simplify right side
    85,534,846.20x = 10,079,230,233,121,208
  5. Step 5: Solve for x
    x = 10,079,230,233,121,208/85,534,846.20
  6. Step 6: Final answer
    x = 117,837,708.03

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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.