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Finding the Fourth Proportional to 66,434.80, 99,679.08 and 26,981.68

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Solution

The fourth proportional to 66,434.80, 99,679.08 and 26,981.68 is: 40,483.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,434.80 : 99,679.08 = 26,981.68 : x
  2. Step 2: Convert to fraction form
    66,434.80/99,679.08 = 26,981.68/x
  3. Step 3: Cross multiply
    66,434.80x = 99,679.08 × 26,981.68
  4. Step 4: Simplify right side
    66,434.80x = 2,689,509,039.25
  5. Step 5: Solve for x
    x = 2,689,509,039.25/66,434.80
  6. Step 6: Final answer
    x = 40,483.44

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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.