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Finding the Fourth Proportional to 66,499.84, 91,803.68 and 51,358.48

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Solution

The fourth proportional to 66,499.84, 91,803.68 and 51,358.48 is: 70,900.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,499.84 : 91,803.68 = 51,358.48 : x
  2. Step 2: Convert to fraction form
    66,499.84/91,803.68 = 51,358.48/x
  3. Step 3: Cross multiply
    66,499.84x = 91,803.68 × 51,358.48
  4. Step 4: Simplify right side
    66,499.84x = 4,714,897,463.21
  5. Step 5: Solve for x
    x = 4,714,897,463.21/66,499.84
  6. Step 6: Final answer
    x = 70,900.88

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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.