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Finding the Fourth Proportional to 66,485.80, 99,728.70 and 63,205.30

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Solution

The fourth proportional to 66,485.80, 99,728.70 and 63,205.30 is: 94,807.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,485.80 : 99,728.70 = 63,205.30 : x
  2. Step 2: Convert to fraction form
    66,485.80/99,728.70 = 63,205.30/x
  3. Step 3: Cross multiply
    66,485.80x = 99,728.70 × 63,205.30
  4. Step 4: Simplify right side
    66,485.80x = 6,303,382,402.11
  5. Step 5: Solve for x
    x = 6,303,382,402.11/66,485.80
  6. Step 6: Final answer
    x = 94,807.95

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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.