Home / 103,663.95-155,333.88-72,135.60

Finding the Fourth Proportional to 103,663.95, 155,333.88 and 72,135.60

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Solution

The fourth proportional to 103,663.95, 155,333.88 and 72,135.60 is: 108,090.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,663.95 : 155,333.88 = 72,135.60 : x
  2. Step 2: Convert to fraction form
    103,663.95/155,333.88 = 72,135.60/x
  3. Step 3: Cross multiply
    103,663.95x = 155,333.88 × 72,135.60
  4. Step 4: Simplify right side
    103,663.95x = 11,205,102,634.13
  5. Step 5: Solve for x
    x = 11,205,102,634.13/103,663.95
  6. Step 6: Final answer
    x = 108,090.64

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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.