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Finding the Fourth Proportional to 52,479.28, 78,751.73 and 21,314.53

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Solution

The fourth proportional to 52,479.28, 78,751.73 and 21,314.53 is: 31,985.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,479.28 : 78,751.73 = 21,314.53 : x
  2. Step 2: Convert to fraction form
    52,479.28/78,751.73 = 21,314.53/x
  3. Step 3: Cross multiply
    52,479.28x = 78,751.73 × 21,314.53
  4. Step 4: Simplify right side
    52,479.28x = 1,678,556,111.64
  5. Step 5: Solve for x
    x = 1,678,556,111.64/52,479.28
  6. Step 6: Final answer
    x = 31,985.12

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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.