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Finding the Fourth Proportional to 91,139.70, 136,600.20 and 46,743.60

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Solution

The fourth proportional to 91,139.70, 136,600.20 and 46,743.60 is: 70,059.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,139.70 : 136,600.20 = 46,743.60 : x
  2. Step 2: Convert to fraction form
    91,139.70/136,600.20 = 46,743.60/x
  3. Step 3: Cross multiply
    91,139.70x = 136,600.20 × 46,743.60
  4. Step 4: Simplify right side
    91,139.70x = 6,385,185,108.72
  5. Step 5: Solve for x
    x = 6,385,185,108.72/91,139.70
  6. Step 6: Final answer
    x = 70,059.32

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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.