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Finding the Fourth Proportional to 243,636.80, 365,455.20 and 103,377.20

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Solution

The fourth proportional to 243,636.80, 365,455.20 and 103,377.20 is: 155,065.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,636.80 : 365,455.20 = 103,377.20 : x
  2. Step 2: Convert to fraction form
    243,636.80/365,455.20 = 103,377.20/x
  3. Step 3: Cross multiply
    243,636.80x = 365,455.20 × 103,377.20
  4. Step 4: Simplify right side
    243,636.80x = 37,779,735,301.44
  5. Step 5: Solve for x
    x = 37,779,735,301.44/243,636.80
  6. Step 6: Final answer
    x = 155,065.80

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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.