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Finding the Fourth Proportional to 103,645.64, 155,478.18 and 41,321

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Solution

The fourth proportional to 103,645.64, 155,478.18 and 41,321 is: 61,985.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,645.64 : 155,478.18 = 41,321 : x
  2. Step 2: Convert to fraction form
    103,645.64/155,478.18 = 41,321/x
  3. Step 3: Cross multiply
    103,645.64x = 155,478.18 × 41,321
  4. Step 4: Simplify right side
    103,645.64x = 6,424,513,875.78
  5. Step 5: Solve for x
    x = 6,424,513,875.78/103,645.64
  6. Step 6: Final answer
    x = 61,985.38

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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.