Home / 103,661.21-155,303.18-72,004.39

Finding the Fourth Proportional to 103,661.21, 155,303.18 and 72,004.39

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Solution

The fourth proportional to 103,661.21, 155,303.18 and 72,004.39 is: 107,875.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,661.21 : 155,303.18 = 72,004.39 : x
  2. Step 2: Convert to fraction form
    103,661.21/155,303.18 = 72,004.39/x
  3. Step 3: Cross multiply
    103,661.21x = 155,303.18 × 72,004.39
  4. Step 4: Simplify right side
    103,661.21x = 11,182,510,740.96
  5. Step 5: Solve for x
    x = 11,182,510,740.96/103,661.21
  6. Step 6: Final answer
    x = 107,875.56

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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.