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Finding the Fourth Proportional to 85,548.60, 128,541.60 and 75,925.80

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Solution

The fourth proportional to 85,548.60, 128,541.60 and 75,925.80 is: 114,082.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,548.60 : 128,541.60 = 75,925.80 : x
  2. Step 2: Convert to fraction form
    85,548.60/128,541.60 = 75,925.80/x
  3. Step 3: Cross multiply
    85,548.60x = 128,541.60 × 75,925.80
  4. Step 4: Simplify right side
    85,548.60x = 9,759,623,813.28
  5. Step 5: Solve for x
    x = 9,759,623,813.28/85,548.60
  6. Step 6: Final answer
    x = 114,082.80

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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.