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Finding the Fourth Proportional to 66,139.84, 99,218.96 and 34,977.28

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Solution

The fourth proportional to 66,139.84, 99,218.96 and 34,977.28 is: 52,470.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,139.84 : 99,218.96 = 34,977.28 : x
  2. Step 2: Convert to fraction form
    66,139.84/99,218.96 = 34,977.28/x
  3. Step 3: Cross multiply
    66,139.84x = 99,218.96 × 34,977.28
  4. Step 4: Simplify right side
    66,139.84x = 3,470,409,345.23
  5. Step 5: Solve for x
    x = 3,470,409,345.23/66,139.84
  6. Step 6: Final answer
    x = 52,470.79

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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.