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Finding the Fourth Proportional to 91,057.60, 136,586.40 and 74,436.40

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Solution

The fourth proportional to 91,057.60, 136,586.40 and 74,436.40 is: 111,654.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,057.60 : 136,586.40 = 74,436.40 : x
  2. Step 2: Convert to fraction form
    91,057.60/136,586.40 = 74,436.40/x
  3. Step 3: Cross multiply
    91,057.60x = 136,586.40 × 74,436.40
  4. Step 4: Simplify right side
    91,057.60x = 10,166,999,904.96
  5. Step 5: Solve for x
    x = 10,166,999,904.96/91,057.60
  6. Step 6: Final answer
    x = 111,654.60

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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.