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Finding the Fourth Proportional to 82,368.80, 123,668.40 and 51,264.80

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Solution

The fourth proportional to 82,368.80, 123,668.40 and 51,264.80 is: 76,968.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,368.80 : 123,668.40 = 51,264.80 : x
  2. Step 2: Convert to fraction form
    82,368.80/123,668.40 = 51,264.80/x
  3. Step 3: Cross multiply
    82,368.80x = 123,668.40 × 51,264.80
  4. Step 4: Simplify right side
    82,368.80x = 6,339,835,792.32
  5. Step 5: Solve for x
    x = 6,339,835,792.32/82,368.80
  6. Step 6: Final answer
    x = 76,968.90

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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.