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Finding the Fourth Proportional to 85,363.70, 128,045.55 and 79,531.70

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Solution

The fourth proportional to 85,363.70, 128,045.55 and 79,531.70 is: 119,297.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,363.70 : 128,045.55 = 79,531.70 : x
  2. Step 2: Convert to fraction form
    85,363.70/128,045.55 = 79,531.70/x
  3. Step 3: Cross multiply
    85,363.70x = 128,045.55 × 79,531.70
  4. Step 4: Simplify right side
    85,363.70x = 10,183,680,268.94
  5. Step 5: Solve for x
    x = 10,183,680,268.94/85,363.70
  6. Step 6: Final answer
    x = 119,297.55

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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.