Home / 81,299.08-121,955.46-31,377.16

Finding the Fourth Proportional to 81,299.08, 121,955.46 and 31,377.16

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Solution

The fourth proportional to 81,299.08, 121,955.46 and 31,377.16 is: 47,068.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,299.08 : 121,955.46 = 31,377.16 : x
  2. Step 2: Convert to fraction form
    81,299.08/121,955.46 = 31,377.16/x
  3. Step 3: Cross multiply
    81,299.08x = 121,955.46 × 31,377.16
  4. Step 4: Simplify right side
    81,299.08x = 3,826,615,981.29
  5. Step 5: Solve for x
    x = 3,826,615,981.29/81,299.08
  6. Step 6: Final answer
    x = 47,068.38

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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.