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Finding the Fourth Proportional to 103,639.15, 155,458.73 and 82,903.15

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Solution

The fourth proportional to 103,639.15, 155,458.73 and 82,903.15 is: 124,354.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,639.15 : 155,458.73 = 82,903.15 : x
  2. Step 2: Convert to fraction form
    103,639.15/155,458.73 = 82,903.15/x
  3. Step 3: Cross multiply
    103,639.15x = 155,458.73 × 82,903.15
  4. Step 4: Simplify right side
    103,639.15x = 12,888,018,412.00
  5. Step 5: Solve for x
    x = 12,888,018,412.00/103,639.15
  6. Step 6: Final answer
    x = 124,354.73

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1.5x scale

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.