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Finding the Fourth Proportional to 103,903.83, 155,855.75 and 83,258.55

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Solution

The fourth proportional to 103,903.83, 155,855.75 and 83,258.55 is: 124,887.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,903.83 : 155,855.75 = 83,258.55 : x
  2. Step 2: Convert to fraction form
    103,903.83/155,855.75 = 83,258.55/x
  3. Step 3: Cross multiply
    103,903.83x = 155,855.75 × 83,258.55
  4. Step 4: Simplify right side
    103,903.83x = 12,976,323,337.87
  5. Step 5: Solve for x
    x = 12,976,323,337.87/103,903.83
  6. Step 6: Final answer
    x = 124,887.83

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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.