Home / 85,934,890.88-128,901,073.32-21,238,701.50

Finding the Fourth Proportional to 85,934,890.88, 128,901,073.32 and 21,238,701.50

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Solution

The fourth proportional to 85,934,890.88, 128,901,073.32 and 21,238,701.50 is: 31,857,740.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,934,890.88 : 128,901,073.32 = 21,238,701.50 : x
  2. Step 2: Convert to fraction form
    85,934,890.88/128,901,073.32 = 21,238,701.50/x
  3. Step 3: Cross multiply
    85,934,890.88x = 128,901,073.32 × 21,238,701.50
  4. Step 4: Simplify right side
    85,934,890.88x = 2,737,691,419,273,094
  5. Step 5: Solve for x
    x = 2,737,691,419,273,094/85,934,890.88
  6. Step 6: Final answer
    x = 31,857,740.10

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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.