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Finding the Fourth Proportional to 91,743.60, 137,485.80 and 64,009.20

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Solution

The fourth proportional to 91,743.60, 137,485.80 and 64,009.20 is: 95,923.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,743.60 : 137,485.80 = 64,009.20 : x
  2. Step 2: Convert to fraction form
    91,743.60/137,485.80 = 64,009.20/x
  3. Step 3: Cross multiply
    91,743.60x = 137,485.80 × 64,009.20
  4. Step 4: Simplify right side
    91,743.60x = 8,800,356,069.36
  5. Step 5: Solve for x
    x = 8,800,356,069.36/91,743.60
  6. Step 6: Final answer
    x = 95,923.38

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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.