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Finding the Fourth Proportional to 260,683.52, 391,056.06 and 83,128.28

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Solution

The fourth proportional to 260,683.52, 391,056.06 and 83,128.28 is: 124,702.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,683.52 : 391,056.06 = 83,128.28 : x
  2. Step 2: Convert to fraction form
    260,683.52/391,056.06 = 83,128.28/x
  3. Step 3: Cross multiply
    260,683.52x = 391,056.06 × 83,128.28
  4. Step 4: Simplify right side
    260,683.52x = 32,507,817,651.38
  5. Step 5: Solve for x
    x = 32,507,817,651.38/260,683.52
  6. Step 6: Final answer
    x = 124,702.24

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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.