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Finding the Fourth Proportional to 61,979.84, 85,528.64 and 33,685.36

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Solution

The fourth proportional to 61,979.84, 85,528.64 and 33,685.36 is: 46,483.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,979.84 : 85,528.64 = 33,685.36 : x
  2. Step 2: Convert to fraction form
    61,979.84/85,528.64 = 33,685.36/x
  3. Step 3: Cross multiply
    61,979.84x = 85,528.64 × 33,685.36
  4. Step 4: Simplify right side
    61,979.84x = 2,881,063,028.71
  5. Step 5: Solve for x
    x = 2,881,063,028.71/61,979.84
  6. Step 6: Final answer
    x = 46,483.87

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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.