Home / 72,769,344.80-109,154,017.20-66,817,205.60

Finding the Fourth Proportional to 72,769,344.80, 109,154,017.20 and 66,817,205.60

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Solution

The fourth proportional to 72,769,344.80, 109,154,017.20 and 66,817,205.60 is: 100,225,808.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,769,344.80 : 109,154,017.20 = 66,817,205.60 : x
  2. Step 2: Convert to fraction form
    72,769,344.80/109,154,017.20 = 66,817,205.60/x
  3. Step 3: Cross multiply
    72,769,344.80x = 109,154,017.20 × 66,817,205.60
  4. Step 4: Simplify right side
    72,769,344.80x = 7,293,366,409,318,337
  5. Step 5: Solve for x
    x = 7,293,366,409,318,337/72,769,344.80
  6. Step 6: Final answer
    x = 100,225,808.40

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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.