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Finding the Fourth Proportional to 282,076.80, 423,113.28 and 71,712

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Solution

The fourth proportional to 282,076.80, 423,113.28 and 71,712 is: 107,567.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,076.80 : 423,113.28 = 71,712 : x
  2. Step 2: Convert to fraction form
    282,076.80/423,113.28 = 71,712/x
  3. Step 3: Cross multiply
    282,076.80x = 423,113.28 × 71,712
  4. Step 4: Simplify right side
    282,076.80x = 30,342,299,535.36
  5. Step 5: Solve for x
    x = 30,342,299,535.36/282,076.80
  6. Step 6: Final answer
    x = 107,567.51

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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.