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Finding the Fourth Proportional to 103,390.80, 155,087.02 and 56,618.16

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Solution

The fourth proportional to 103,390.80, 155,087.02 and 56,618.16 is: 84,927.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,390.80 : 155,087.02 = 56,618.16 : x
  2. Step 2: Convert to fraction form
    103,390.80/155,087.02 = 56,618.16/x
  3. Step 3: Cross multiply
    103,390.80x = 155,087.02 × 56,618.16
  4. Step 4: Simplify right side
    103,390.80x = 8,780,741,712.28
  5. Step 5: Solve for x
    x = 8,780,741,712.28/103,390.80
  6. Step 6: Final answer
    x = 84,927.69

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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.