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Finding the Fourth Proportional to 194,781.60, 291,970.80 and 105,847.20

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Solution

The fourth proportional to 194,781.60, 291,970.80 and 105,847.20 is: 158,661.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    194,781.60 : 291,970.80 = 105,847.20 : x
  2. Step 2: Convert to fraction form
    194,781.60/291,970.80 = 105,847.20/x
  3. Step 3: Cross multiply
    194,781.60x = 291,970.80 × 105,847.20
  4. Step 4: Simplify right side
    194,781.60x = 30,904,291,661.76
  5. Step 5: Solve for x
    x = 30,904,291,661.76/194,781.60
  6. Step 6: Final answer
    x = 158,661.25

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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.