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Finding the Fourth Proportional to 66,499.78, 91,803.54 and 51,358.45

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Solution

The fourth proportional to 66,499.78, 91,803.54 and 51,358.45 is: 70,900.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,499.78 : 91,803.54 = 51,358.45 : x
  2. Step 2: Convert to fraction form
    66,499.78/91,803.54 = 51,358.45/x
  3. Step 3: Cross multiply
    66,499.78x = 91,803.54 × 51,358.45
  4. Step 4: Simplify right side
    66,499.78x = 4,714,887,518.91
  5. Step 5: Solve for x
    x = 4,714,887,518.91/66,499.78
  6. Step 6: Final answer
    x = 70,900.80

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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.