Home / 128,723,046.72-177,641,287.76-69,989,655.04

Finding the Fourth Proportional to 128,723,046.72, 177,641,287.76 and 69,989,655.04

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Solution

The fourth proportional to 128,723,046.72, 177,641,287.76 and 69,989,655.04 is: 96,587,617.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,723,046.72 : 177,641,287.76 = 69,989,655.04 : x
  2. Step 2: Convert to fraction form
    128,723,046.72/177,641,287.76 = 69,989,655.04/x
  3. Step 3: Cross multiply
    128,723,046.72x = 177,641,287.76 × 69,989,655.04
  4. Step 4: Simplify right side
    128,723,046.72x = 12,433,052,451,183,774
  5. Step 5: Solve for x
    x = 12,433,052,451,183,774/128,723,046.72
  6. Step 6: Final answer
    x = 96,587,617.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.