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Finding the Fourth Proportional to 85,214.70, 127,860.45 and 40,824.30

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Solution

The fourth proportional to 85,214.70, 127,860.45 and 40,824.30 is: 61,254.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,214.70 : 127,860.45 = 40,824.30 : x
  2. Step 2: Convert to fraction form
    85,214.70/127,860.45 = 40,824.30/x
  3. Step 3: Cross multiply
    85,214.70x = 127,860.45 × 40,824.30
  4. Step 4: Simplify right side
    85,214.70x = 5,219,813,368.94
  5. Step 5: Solve for x
    x = 5,219,813,368.94/85,214.70
  6. Step 6: Final answer
    x = 61,254.85

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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.