Home / 102,561.20-153,712.20-91,415.60

Finding the Fourth Proportional to 102,561.20, 153,712.20 and 91,415.60

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Solution

The fourth proportional to 102,561.20, 153,712.20 and 91,415.60 is: 137,007.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,561.20 : 153,712.20 = 91,415.60 : x
  2. Step 2: Convert to fraction form
    102,561.20/153,712.20 = 91,415.60/x
  3. Step 3: Cross multiply
    102,561.20x = 153,712.20 × 91,415.60
  4. Step 4: Simplify right side
    102,561.20x = 14,051,692,990.32
  5. Step 5: Solve for x
    x = 14,051,692,990.32/102,561.20
  6. Step 6: Final answer
    x = 137,007.88

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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.