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Finding the Fourth Proportional to 51,807.98, 77,798.64 and 45,290.72

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Solution

The fourth proportional to 51,807.98, 77,798.64 and 45,290.72 is: 68,011.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,807.98 : 77,798.64 = 45,290.72 : x
  2. Step 2: Convert to fraction form
    51,807.98/77,798.64 = 45,290.72/x
  3. Step 3: Cross multiply
    51,807.98x = 77,798.64 × 45,290.72
  4. Step 4: Simplify right side
    51,807.98x = 3,523,556,420.62
  5. Step 5: Solve for x
    x = 3,523,556,420.62/51,807.98
  6. Step 6: Final answer
    x = 68,011.85

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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.