Home / 103,212.68-142,439.13-57,905.01

Finding the Fourth Proportional to 103,212.68, 142,439.13 and 57,905.01

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Solution

The fourth proportional to 103,212.68, 142,439.13 and 57,905.01 is: 79,912.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,212.68 : 142,439.13 = 57,905.01 : x
  2. Step 2: Convert to fraction form
    103,212.68/142,439.13 = 57,905.01/x
  3. Step 3: Cross multiply
    103,212.68x = 142,439.13 × 57,905.01
  4. Step 4: Simplify right side
    103,212.68x = 8,247,939,247.04
  5. Step 5: Solve for x
    x = 8,247,939,247.04/103,212.68
  6. Step 6: Final answer
    x = 79,912.08

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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.