Home / 108,569.40-162,829.80-71,390.40

Finding the Fourth Proportional to 108,569.40, 162,829.80 and 71,390.40

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Solution

The fourth proportional to 108,569.40, 162,829.80 and 71,390.40 is: 107,069.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,569.40 : 162,829.80 = 71,390.40 : x
  2. Step 2: Convert to fraction form
    108,569.40/162,829.80 = 71,390.40/x
  3. Step 3: Cross multiply
    108,569.40x = 162,829.80 × 71,390.40
  4. Step 4: Simplify right side
    108,569.40x = 11,624,484,553.92
  5. Step 5: Solve for x
    x = 11,624,484,553.92/108,569.40
  6. Step 6: Final answer
    x = 107,069.62

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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.