Home / 81,397.11-121,898.82-70,374.63

Finding the Fourth Proportional to 81,397.11, 121,898.82 and 70,374.63

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Solution

The fourth proportional to 81,397.11, 121,898.82 and 70,374.63 is: 105,391.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,397.11 : 121,898.82 = 70,374.63 : x
  2. Step 2: Convert to fraction form
    81,397.11/121,898.82 = 70,374.63/x
  3. Step 3: Cross multiply
    81,397.11x = 121,898.82 × 70,374.63
  4. Step 4: Simplify right side
    81,397.11x = 8,578,584,354.94
  5. Step 5: Solve for x
    x = 8,578,584,354.94/81,397.11
  6. Step 6: Final answer
    x = 105,391.76

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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.