Home / 80,741.10-121,374.09-72,459.66

Finding the Fourth Proportional to 80,741.10, 121,374.09 and 72,459.66

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Solution

The fourth proportional to 80,741.10, 121,374.09 and 72,459.66 is: 108,925.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,741.10 : 121,374.09 = 72,459.66 : x
  2. Step 2: Convert to fraction form
    80,741.10/121,374.09 = 72,459.66/x
  3. Step 3: Cross multiply
    80,741.10x = 121,374.09 × 72,459.66
  4. Step 4: Simplify right side
    80,741.10x = 8,794,725,294.21
  5. Step 5: Solve for x
    x = 8,794,725,294.21/80,741.10
  6. Step 6: Final answer
    x = 108,925.01

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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.