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Finding the Fourth Proportional to 66,486.30, 99,729.45 and 63,205.80

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Solution

The fourth proportional to 66,486.30, 99,729.45 and 63,205.80 is: 94,808.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,486.30 : 99,729.45 = 63,205.80 : x
  2. Step 2: Convert to fraction form
    66,486.30/99,729.45 = 63,205.80/x
  3. Step 3: Cross multiply
    66,486.30x = 99,729.45 × 63,205.80
  4. Step 4: Simplify right side
    66,486.30x = 6,303,479,670.81
  5. Step 5: Solve for x
    x = 6,303,479,670.81/66,486.30
  6. Step 6: Final answer
    x = 94,808.70

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1.5x scale

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.