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Finding the Fourth Proportional to 66,472.21, 91,765.51 and 51,330.88

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Solution

The fourth proportional to 66,472.21, 91,765.51 and 51,330.88 is: 70,862.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,472.21 : 91,765.51 = 51,330.88 : x
  2. Step 2: Convert to fraction form
    66,472.21/91,765.51 = 51,330.88/x
  3. Step 3: Cross multiply
    66,472.21x = 91,765.51 × 51,330.88
  4. Step 4: Simplify right side
    66,472.21x = 4,710,404,381.95
  5. Step 5: Solve for x
    x = 4,710,404,381.95/66,472.21
  6. Step 6: Final answer
    x = 70,862.76

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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.