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Finding the Fourth Proportional to 63,015.71, 86,913.63 and 42,838.58

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Solution

The fourth proportional to 63,015.71, 86,913.63 and 42,838.58 is: 59,084.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,015.71 : 86,913.63 = 42,838.58 : x
  2. Step 2: Convert to fraction form
    63,015.71/86,913.63 = 42,838.58/x
  3. Step 3: Cross multiply
    63,015.71x = 86,913.63 × 42,838.58
  4. Step 4: Simplify right side
    63,015.71x = 3,723,256,057.28
  5. Step 5: Solve for x
    x = 3,723,256,057.28/63,015.71
  6. Step 6: Final answer
    x = 59,084.57

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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.