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Finding the Fourth Proportional to 84,155.74, 115,994.01 and 73,920.58

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Solution

The fourth proportional to 84,155.74, 115,994.01 and 73,920.58 is: 101,886.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,155.74 : 115,994.01 = 73,920.58 : x
  2. Step 2: Convert to fraction form
    84,155.74/115,994.01 = 73,920.58/x
  3. Step 3: Cross multiply
    84,155.74x = 115,994.01 × 73,920.58
  4. Step 4: Simplify right side
    84,155.74x = 8,574,344,495.73
  5. Step 5: Solve for x
    x = 8,574,344,495.73/84,155.74
  6. Step 6: Final answer
    x = 101,886.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.