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Finding the Fourth Proportional to 103,298.06, 155,030.13 and 53,392.78

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Solution

The fourth proportional to 103,298.06, 155,030.13 and 53,392.78 is: 80,132.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,298.06 : 155,030.13 = 53,392.78 : x
  2. Step 2: Convert to fraction form
    103,298.06/155,030.13 = 53,392.78/x
  3. Step 3: Cross multiply
    103,298.06x = 155,030.13 × 53,392.78
  4. Step 4: Simplify right side
    103,298.06x = 8,277,489,236.89
  5. Step 5: Solve for x
    x = 8,277,489,236.89/103,298.06
  6. Step 6: Final answer
    x = 80,132.09

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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.