Home / 87,688.65-120,983.40-53,661.21

Finding the Fourth Proportional to 87,688.65, 120,983.40 and 53,661.21

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Solution

The fourth proportional to 87,688.65, 120,983.40 and 53,661.21 is: 74,035.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,688.65 : 120,983.40 = 53,661.21 : x
  2. Step 2: Convert to fraction form
    87,688.65/120,983.40 = 53,661.21/x
  3. Step 3: Cross multiply
    87,688.65x = 120,983.40 × 53,661.21
  4. Step 4: Simplify right side
    87,688.65x = 6,492,115,633.91
  5. Step 5: Solve for x
    x = 6,492,115,633.91/87,688.65
  6. Step 6: Final answer
    x = 74,035.99

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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.