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Finding the Fourth Proportional to 103,661.46, 155,303.56 and 72,004.64

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Solution

The fourth proportional to 103,661.46, 155,303.56 and 72,004.64 is: 107,875.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,661.46 : 155,303.56 = 72,004.64 : x
  2. Step 2: Convert to fraction form
    103,661.46/155,303.56 = 72,004.64/x
  3. Step 3: Cross multiply
    103,661.46x = 155,303.56 × 72,004.64
  4. Step 4: Simplify right side
    103,661.46x = 11,182,576,928.52
  5. Step 5: Solve for x
    x = 11,182,576,928.52/103,661.46
  6. Step 6: Final answer
    x = 107,875.94

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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.