Home / 78,330.21-108,092.76-42,519.45

Finding the Fourth Proportional to 78,330.21, 108,092.76 and 42,519.45

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Solution

The fourth proportional to 78,330.21, 108,092.76 and 42,519.45 is: 58,675.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,330.21 : 108,092.76 = 42,519.45 : x
  2. Step 2: Convert to fraction form
    78,330.21/108,092.76 = 42,519.45/x
  3. Step 3: Cross multiply
    78,330.21x = 108,092.76 × 42,519.45
  4. Step 4: Simplify right side
    78,330.21x = 4,596,044,704.18
  5. Step 5: Solve for x
    x = 4,596,044,704.18/78,330.21
  6. Step 6: Final answer
    x = 58,675.25

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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.