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Finding the Fourth Proportional to 71,700.82, 98,949.55 and 39,437.93

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Solution

The fourth proportional to 71,700.82, 98,949.55 and 39,437.93 is: 54,425.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,700.82 : 98,949.55 = 39,437.93 : x
  2. Step 2: Convert to fraction form
    71,700.82/98,949.55 = 39,437.93/x
  3. Step 3: Cross multiply
    71,700.82x = 98,949.55 × 39,437.93
  4. Step 4: Simplify right side
    71,700.82x = 3,902,365,649.16
  5. Step 5: Solve for x
    x = 3,902,365,649.16/71,700.82
  6. Step 6: Final answer
    x = 54,425.67

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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.