Home / 42,689.72-64,057.86-28,661.46

Finding the Fourth Proportional to 42,689.72, 64,057.86 and 28,661.46

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Solution

The fourth proportional to 42,689.72, 64,057.86 and 28,661.46 is: 43,007.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,689.72 : 64,057.86 = 28,661.46 : x
  2. Step 2: Convert to fraction form
    42,689.72/64,057.86 = 28,661.46/x
  3. Step 3: Cross multiply
    42,689.72x = 64,057.86 × 28,661.46
  4. Step 4: Simplify right side
    42,689.72x = 1,835,991,792.08
  5. Step 5: Solve for x
    x = 1,835,991,792.08/42,689.72
  6. Step 6: Final answer
    x = 43,007.83

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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.