Home / 103,415.60-142,703.40-58,083.20

Finding the Fourth Proportional to 103,415.60, 142,703.40 and 58,083.20

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Solution

The fourth proportional to 103,415.60, 142,703.40 and 58,083.20 is: 80,149.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,415.60 : 142,703.40 = 58,083.20 : x
  2. Step 2: Convert to fraction form
    103,415.60/142,703.40 = 58,083.20/x
  3. Step 3: Cross multiply
    103,415.60x = 142,703.40 × 58,083.20
  4. Step 4: Simplify right side
    103,415.60x = 8,288,670,122.88
  5. Step 5: Solve for x
    x = 8,288,670,122.88/103,415.60
  6. Step 6: Final answer
    x = 80,149.13

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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.