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Finding the Fourth Proportional to 103,633.60, 155,450.40 and 78,750.40

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Solution

The fourth proportional to 103,633.60, 155,450.40 and 78,750.40 is: 118,125.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,633.60 : 155,450.40 = 78,750.40 : x
  2. Step 2: Convert to fraction form
    103,633.60/155,450.40 = 78,750.40/x
  3. Step 3: Cross multiply
    103,633.60x = 155,450.40 × 78,750.40
  4. Step 4: Simplify right side
    103,633.60x = 12,241,781,180.16
  5. Step 5: Solve for x
    x = 12,241,781,180.16/103,633.60
  6. Step 6: Final answer
    x = 118,125.60

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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.