Home / 81,096.72-121,671.10-38,979.86

Finding the Fourth Proportional to 81,096.72, 121,671.10 and 38,979.86

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Solution

The fourth proportional to 81,096.72, 121,671.10 and 38,979.86 is: 58,482.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,096.72 : 121,671.10 = 38,979.86 : x
  2. Step 2: Convert to fraction form
    81,096.72/121,671.10 = 38,979.86/x
  3. Step 3: Cross multiply
    81,096.72x = 121,671.10 × 38,979.86
  4. Step 4: Simplify right side
    81,096.72x = 4,742,722,139.87
  5. Step 5: Solve for x
    x = 4,742,722,139.87/81,096.72
  6. Step 6: Final answer
    x = 58,482.29

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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.