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Finding the Fourth Proportional to 85,502.40, 128,407.20 and 82,737.60

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Solution

The fourth proportional to 85,502.40, 128,407.20 and 82,737.60 is: 124,255.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,502.40 : 128,407.20 = 82,737.60 : x
  2. Step 2: Convert to fraction form
    85,502.40/128,407.20 = 82,737.60/x
  3. Step 3: Cross multiply
    85,502.40x = 128,407.20 × 82,737.60
  4. Step 4: Simplify right side
    85,502.40x = 10,624,103,550.72
  5. Step 5: Solve for x
    x = 10,624,103,550.72/85,502.40
  6. Step 6: Final answer
    x = 124,255.03

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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.