Home / 87,681.18-120,971-49,435.94

Finding the Fourth Proportional to 87,681.18, 120,971 and 49,435.94

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Solution

The fourth proportional to 87,681.18, 120,971 and 49,435.94 is: 68,205.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,681.18 : 120,971 = 49,435.94 : x
  2. Step 2: Convert to fraction form
    87,681.18/120,971 = 49,435.94/x
  3. Step 3: Cross multiply
    87,681.18x = 120,971 × 49,435.94
  4. Step 4: Simplify right side
    87,681.18x = 5,980,315,097.74
  5. Step 5: Solve for x
    x = 5,980,315,097.74/87,681.18
  6. Step 6: Final answer
    x = 68,205.23

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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.