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Finding the Fourth Proportional to 78,569.28, 108,424.48 and 43,241.28

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Solution

The fourth proportional to 78,569.28, 108,424.48 and 43,241.28 is: 59,672.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,569.28 : 108,424.48 = 43,241.28 : x
  2. Step 2: Convert to fraction form
    78,569.28/108,424.48 = 43,241.28/x
  3. Step 3: Cross multiply
    78,569.28x = 108,424.48 × 43,241.28
  4. Step 4: Simplify right side
    78,569.28x = 4,688,413,298.53
  5. Step 5: Solve for x
    x = 4,688,413,298.53/78,569.28
  6. Step 6: Final answer
    x = 59,672.35

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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.