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Finding the Fourth Proportional to 66,247,210.80, 99,370,816.20 and 20,808,932.40

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Solution

The fourth proportional to 66,247,210.80, 99,370,816.20 and 20,808,932.40 is: 31,213,398.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,247,210.80 : 99,370,816.20 = 20,808,932.40 : x
  2. Step 2: Convert to fraction form
    66,247,210.80/99,370,816.20 = 20,808,932.40/x
  3. Step 3: Cross multiply
    66,247,210.80x = 99,370,816.20 × 20,808,932.40
  4. Step 4: Simplify right side
    66,247,210.80x = 2,067,800,596,838,624.75
  5. Step 5: Solve for x
    x = 2,067,800,596,838,624.75/66,247,210.80
  6. Step 6: Final answer
    x = 31,213,398.60

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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.