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Finding the Fourth Proportional to 71,647.76, 98,868.30 and 39,814.76

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Solution

The fourth proportional to 71,647.76, 98,868.30 and 39,814.76 is: 54,941.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,647.76 : 98,868.30 = 39,814.76 : x
  2. Step 2: Convert to fraction form
    71,647.76/98,868.30 = 39,814.76/x
  3. Step 3: Cross multiply
    71,647.76x = 98,868.30 × 39,814.76
  4. Step 4: Simplify right side
    71,647.76x = 3,936,417,636.11
  5. Step 5: Solve for x
    x = 3,936,417,636.11/71,647.76
  6. Step 6: Final answer
    x = 54,941.25

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1.5x scale

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.