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Finding the Fourth Proportional to 103,656.20, 155,484.60 and 28,780.40

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Solution

The fourth proportional to 103,656.20, 155,484.60 and 28,780.40 is: 43,170.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,656.20 : 155,484.60 = 28,780.40 : x
  2. Step 2: Convert to fraction form
    103,656.20/155,484.60 = 28,780.40/x
  3. Step 3: Cross multiply
    103,656.20x = 155,484.60 × 28,780.40
  4. Step 4: Simplify right side
    103,656.20x = 4,474,908,981.84
  5. Step 5: Solve for x
    x = 4,474,908,981.84/103,656.20
  6. Step 6: Final answer
    x = 43,170.68

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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.