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Finding the Fourth Proportional to 103,428.30, 155,032.09 and 58,959.30

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Solution

The fourth proportional to 103,428.30, 155,032.09 and 58,959.30 is: 88,376.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,428.30 : 155,032.09 = 58,959.30 : x
  2. Step 2: Convert to fraction form
    103,428.30/155,032.09 = 58,959.30/x
  3. Step 3: Cross multiply
    103,428.30x = 155,032.09 × 58,959.30
  4. Step 4: Simplify right side
    103,428.30x = 9,140,583,209.14
  5. Step 5: Solve for x
    x = 9,140,583,209.14/103,428.30
  6. Step 6: Final answer
    x = 88,376.04

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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.