Home / 85,987,421.57-128,853,586.42-63,156,716.21

Finding the Fourth Proportional to 85,987,421.57, 128,853,586.42 and 63,156,716.21

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Solution

The fourth proportional to 85,987,421.57, 128,853,586.42 and 63,156,716.21 is: 94,641,393.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,987,421.57 : 128,853,586.42 = 63,156,716.21 : x
  2. Step 2: Convert to fraction form
    85,987,421.57/128,853,586.42 = 63,156,716.21/x
  3. Step 3: Cross multiply
    85,987,421.57x = 128,853,586.42 × 63,156,716.21
  4. Step 4: Simplify right side
    85,987,421.57x = 8,137,969,390,332,892
  5. Step 5: Solve for x
    x = 8,137,969,390,332,892/85,987,421.57
  6. Step 6: Final answer
    x = 94,641,393.37

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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.