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Finding the Fourth Proportional to 85,417.40, 128,223.30 and 50,376.80

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Solution

The fourth proportional to 85,417.40, 128,223.30 and 50,376.80 is: 75,622.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,417.40 : 128,223.30 = 50,376.80 : x
  2. Step 2: Convert to fraction form
    85,417.40/128,223.30 = 50,376.80/x
  3. Step 3: Cross multiply
    85,417.40x = 128,223.30 × 50,376.80
  4. Step 4: Simplify right side
    85,417.40x = 6,459,479,539.44
  5. Step 5: Solve for x
    x = 6,459,479,539.44/85,417.40
  6. Step 6: Final answer
    x = 75,622.53

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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.