Home / 85,839,981.70-128,759,972.55-82,491,903.40

Finding the Fourth Proportional to 85,839,981.70, 128,759,972.55 and 82,491,903.40

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Solution

The fourth proportional to 85,839,981.70, 128,759,972.55 and 82,491,903.40 is: 123,737,855.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,839,981.70 : 128,759,972.55 = 82,491,903.40 : x
  2. Step 2: Convert to fraction form
    85,839,981.70/128,759,972.55 = 82,491,903.40/x
  3. Step 3: Cross multiply
    85,839,981.70x = 128,759,972.55 × 82,491,903.40
  4. Step 4: Simplify right side
    85,839,981.70x = 10,621,655,217,381,252
  5. Step 5: Solve for x
    x = 10,621,655,217,381,252/85,839,981.70
  6. Step 6: Final answer
    x = 123,737,855.10

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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.