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Finding the Fourth Proportional to 62,784.40, 86,639.64 and 34,490.48

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Solution

The fourth proportional to 62,784.40, 86,639.64 and 34,490.48 is: 47,595.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,784.40 : 86,639.64 = 34,490.48 : x
  2. Step 2: Convert to fraction form
    62,784.40/86,639.64 = 34,490.48/x
  3. Step 3: Cross multiply
    62,784.40x = 86,639.64 × 34,490.48
  4. Step 4: Simplify right side
    62,784.40x = 2,988,242,770.63
  5. Step 5: Solve for x
    x = 2,988,242,770.63/62,784.40
  6. Step 6: Final answer
    x = 47,595.31

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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.