Home / 87,399.74-120,547.12-64,739.69

Finding the Fourth Proportional to 87,399.74, 120,547.12 and 64,739.69

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Solution

The fourth proportional to 87,399.74, 120,547.12 and 64,739.69 is: 89,292.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,399.74 : 120,547.12 = 64,739.69 : x
  2. Step 2: Convert to fraction form
    87,399.74/120,547.12 = 64,739.69/x
  3. Step 3: Cross multiply
    87,399.74x = 120,547.12 × 64,739.69
  4. Step 4: Simplify right side
    87,399.74x = 7,804,183,179.19
  5. Step 5: Solve for x
    x = 7,804,183,179.19/87,399.74
  6. Step 6: Final answer
    x = 89,292.98

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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.