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Finding the Fourth Proportional to 69,079.90, 103,696.65 and 42,814.30

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Solution

The fourth proportional to 69,079.90, 103,696.65 and 42,814.30 is: 64,269.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,079.90 : 103,696.65 = 42,814.30 : x
  2. Step 2: Convert to fraction form
    69,079.90/103,696.65 = 42,814.30/x
  3. Step 3: Cross multiply
    69,079.90x = 103,696.65 × 42,814.30
  4. Step 4: Simplify right side
    69,079.90x = 4,439,699,482.10
  5. Step 5: Solve for x
    x = 4,439,699,482.10/69,079.90
  6. Step 6: Final answer
    x = 64,269.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.