Home / 85,408,032.20-128,112,048.30-81,439,939.40

Finding the Fourth Proportional to 85,408,032.20, 128,112,048.30 and 81,439,939.40

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Solution

The fourth proportional to 85,408,032.20, 128,112,048.30 and 81,439,939.40 is: 122,159,909.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,408,032.20 : 128,112,048.30 = 81,439,939.40 : x
  2. Step 2: Convert to fraction form
    85,408,032.20/128,112,048.30 = 81,439,939.40/x
  3. Step 3: Cross multiply
    85,408,032.20x = 128,112,048.30 × 81,439,939.40
  4. Step 4: Simplify right side
    85,408,032.20x = 10,433,437,449,961,874
  5. Step 5: Solve for x
    x = 10,433,437,449,961,874/85,408,032.20
  6. Step 6: Final answer
    x = 122,159,909.10

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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.