Home / 81,068.40-121,566.15-31,131.90

Finding the Fourth Proportional to 81,068.40, 121,566.15 and 31,131.90

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Solution

The fourth proportional to 81,068.40, 121,566.15 and 31,131.90 is: 46,683.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,068.40 : 121,566.15 = 31,131.90 : x
  2. Step 2: Convert to fraction form
    81,068.40/121,566.15 = 31,131.90/x
  3. Step 3: Cross multiply
    81,068.40x = 121,566.15 × 31,131.90
  4. Step 4: Simplify right side
    81,068.40x = 3,784,585,225.19
  5. Step 5: Solve for x
    x = 3,784,585,225.19/81,068.40
  6. Step 6: Final answer
    x = 46,683.85

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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.