Home / 78,122.20-107,808.66-42,312.36

Finding the Fourth Proportional to 78,122.20, 107,808.66 and 42,312.36

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Solution

The fourth proportional to 78,122.20, 107,808.66 and 42,312.36 is: 58,391.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,122.20 : 107,808.66 = 42,312.36 : x
  2. Step 2: Convert to fraction form
    78,122.20/107,808.66 = 42,312.36/x
  3. Step 3: Cross multiply
    78,122.20x = 107,808.66 × 42,312.36
  4. Step 4: Simplify right side
    78,122.20x = 4,561,638,833.04
  5. Step 5: Solve for x
    x = 4,561,638,833.04/78,122.20
  6. Step 6: Final answer
    x = 58,391.07

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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.