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Finding the Fourth Proportional to 103,654.61, 155,482.78 and 28,780.59

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Solution

The fourth proportional to 103,654.61, 155,482.78 and 28,780.59 is: 43,171.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,654.61 : 155,482.78 = 28,780.59 : x
  2. Step 2: Convert to fraction form
    103,654.61/155,482.78 = 28,780.59/x
  3. Step 3: Cross multiply
    103,654.61x = 155,482.78 × 28,780.59
  4. Step 4: Simplify right side
    103,654.61x = 4,474,886,460.00
  5. Step 5: Solve for x
    x = 4,474,886,460.00/103,654.61
  6. Step 6: Final answer
    x = 43,171.13

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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.