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Finding the Fourth Proportional to 91,059.60, 136,608.60 and 28,736.40

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Solution

The fourth proportional to 91,059.60, 136,608.60 and 28,736.40 is: 43,110.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,059.60 : 136,608.60 = 28,736.40 : x
  2. Step 2: Convert to fraction form
    91,059.60/136,608.60 = 28,736.40/x
  3. Step 3: Cross multiply
    91,059.60x = 136,608.60 × 28,736.40
  4. Step 4: Simplify right side
    91,059.60x = 3,925,639,373.04
  5. Step 5: Solve for x
    x = 3,925,639,373.04/91,059.60
  6. Step 6: Final answer
    x = 43,110.66

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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.