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Finding the Fourth Proportional to 103,495.92, 155,352.45 and 91,725

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Solution

The fourth proportional to 103,495.92, 155,352.45 and 91,725 is: 137,683.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,495.92 : 155,352.45 = 91,725 : x
  2. Step 2: Convert to fraction form
    103,495.92/155,352.45 = 91,725/x
  3. Step 3: Cross multiply
    103,495.92x = 155,352.45 × 91,725
  4. Step 4: Simplify right side
    103,495.92x = 14,249,703,476.25
  5. Step 5: Solve for x
    x = 14,249,703,476.25/103,495.92
  6. Step 6: Final answer
    x = 137,683.72

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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.