Home / 78,349.29-108,122.01-42,539.31

Finding the Fourth Proportional to 78,349.29, 108,122.01 and 42,539.31

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Solution

The fourth proportional to 78,349.29, 108,122.01 and 42,539.31 is: 58,704.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,349.29 : 108,122.01 = 42,539.31 : x
  2. Step 2: Convert to fraction form
    78,349.29/108,122.01 = 42,539.31/x
  3. Step 3: Cross multiply
    78,349.29x = 108,122.01 × 42,539.31
  4. Step 4: Simplify right side
    78,349.29x = 4,599,435,701.21
  5. Step 5: Solve for x
    x = 4,599,435,701.21/78,349.29
  6. Step 6: Final answer
    x = 58,704.24

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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.