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Finding the Fourth Proportional to 103,617.60, 155,426.40 and 78,734.40

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Solution

The fourth proportional to 103,617.60, 155,426.40 and 78,734.40 is: 118,101.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,617.60 : 155,426.40 = 78,734.40 : x
  2. Step 2: Convert to fraction form
    103,617.60/155,426.40 = 78,734.40/x
  3. Step 3: Cross multiply
    103,617.60x = 155,426.40 × 78,734.40
  4. Step 4: Simplify right side
    103,617.60x = 12,237,404,348.16
  5. Step 5: Solve for x
    x = 12,237,404,348.16/103,617.60
  6. Step 6: Final answer
    x = 118,101.60

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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.