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Finding the Fourth Proportional to 78,519, 108,357.30 and 44,985

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Solution

The fourth proportional to 78,519, 108,357.30 and 44,985 is: 62,079.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,519 : 108,357.30 = 44,985 : x
  2. Step 2: Convert to fraction form
    78,519/108,357.30 = 44,985/x
  3. Step 3: Cross multiply
    78,519x = 108,357.30 × 44,985
  4. Step 4: Simplify right side
    78,519x = 4,874,453,140.50
  5. Step 5: Solve for x
    x = 4,874,453,140.50/78,519
  6. Step 6: Final answer
    x = 62,079.92

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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.