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Finding the Fourth Proportional to 103,503.60, 155,255.40 and 90,381.60

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Solution

The fourth proportional to 103,503.60, 155,255.40 and 90,381.60 is: 135,572.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,503.60 : 155,255.40 = 90,381.60 : x
  2. Step 2: Convert to fraction form
    103,503.60/155,255.40 = 90,381.60/x
  3. Step 3: Cross multiply
    103,503.60x = 155,255.40 × 90,381.60
  4. Step 4: Simplify right side
    103,503.60x = 14,032,231,460.64
  5. Step 5: Solve for x
    x = 14,032,231,460.64/103,503.60
  6. Step 6: Final answer
    x = 135,572.40

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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.