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Finding the Fourth Proportional to 103,428.10, 155,142.15 and 64,062.10

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Solution

The fourth proportional to 103,428.10, 155,142.15 and 64,062.10 is: 96,093.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,428.10 : 155,142.15 = 64,062.10 : x
  2. Step 2: Convert to fraction form
    103,428.10/155,142.15 = 64,062.10/x
  3. Step 3: Cross multiply
    103,428.10x = 155,142.15 × 64,062.10
  4. Step 4: Simplify right side
    103,428.10x = 9,938,731,927.52
  5. Step 5: Solve for x
    x = 9,938,731,927.52/103,428.10
  6. Step 6: Final answer
    x = 96,093.15

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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.