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Finding the Fourth Proportional to 81,303.82, 121,925.39 and 27,980.71

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Solution

The fourth proportional to 81,303.82, 121,925.39 and 27,980.71 is: 41,960.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,303.82 : 121,925.39 = 27,980.71 : x
  2. Step 2: Convert to fraction form
    81,303.82/121,925.39 = 27,980.71/x
  3. Step 3: Cross multiply
    81,303.82x = 121,925.39 × 27,980.71
  4. Step 4: Simplify right side
    81,303.82x = 3,411,558,534.51
  5. Step 5: Solve for x
    x = 3,411,558,534.51/81,303.82
  6. Step 6: Final answer
    x = 41,960.62

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1.5x scale

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.