Home / 81,479.81-122,220.26-31,565.45

Finding the Fourth Proportional to 81,479.81, 122,220.26 and 31,565.45

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Solution

The fourth proportional to 81,479.81, 122,220.26 and 31,565.45 is: 47,348.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,479.81 : 122,220.26 = 31,565.45 : x
  2. Step 2: Convert to fraction form
    81,479.81/122,220.26 = 31,565.45/x
  3. Step 3: Cross multiply
    81,479.81x = 122,220.26 × 31,565.45
  4. Step 4: Simplify right side
    81,479.81x = 3,857,937,506.02
  5. Step 5: Solve for x
    x = 3,857,937,506.02/81,479.81
  6. Step 6: Final answer
    x = 47,348.39

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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.