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Finding the Fourth Proportional to 66,512.34, 91,820.89 and 51,371.01

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Solution

The fourth proportional to 66,512.34, 91,820.89 and 51,371.01 is: 70,918.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,512.34 : 91,820.89 = 51,371.01 : x
  2. Step 2: Convert to fraction form
    66,512.34/91,820.89 = 51,371.01/x
  3. Step 3: Cross multiply
    66,512.34x = 91,820.89 × 51,371.01
  4. Step 4: Simplify right side
    66,512.34x = 4,716,931,922.61
  5. Step 5: Solve for x
    x = 4,716,931,922.61/66,512.34
  6. Step 6: Final answer
    x = 70,918.15

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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.