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Finding the Fourth Proportional to 103,409.57, 155,245.60 and 87,925.61

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Solution

The fourth proportional to 103,409.57, 155,245.60 and 87,925.61 is: 132,000.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,409.57 : 155,245.60 = 87,925.61 : x
  2. Step 2: Convert to fraction form
    103,409.57/155,245.60 = 87,925.61/x
  3. Step 3: Cross multiply
    103,409.57x = 155,245.60 × 87,925.61
  4. Step 4: Simplify right side
    103,409.57x = 13,650,064,079.82
  5. Step 5: Solve for x
    x = 13,650,064,079.82/103,409.57
  6. Step 6: Final answer
    x = 132,000.01

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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.